The Set
Ashen Decay can currently be extended to a maximum of 10.4 seconds (30% of its duration as a bonus, the standard pandemic mechanism for debuffs).
We have already extensively covered why tier sets relying on Bone Shield charge loss are impossible to balance (and lackluster, gimmicky, and jarring as a player due to the inability to interact with Bone Shield short of showing your back or relying on a single use of Tombstone once per minute) when the Vault of the Incarnates set was showcased. The 2-piece relies entirely on this, which is disappointing, to say the least.
The proc chance appears to be either in the 10-15% range, or 2ppm; as we get more data, we’ll figure out the exact details. Tombstone appears to have a 50% chance to trigger the effect, making it pretty consistent with being a 10% chance. Needless to say, this effect is boring, and actually harmful for reasons we’ll cover in detail as we discuss the implications of the set on gameplay.
On the other hand, the 4-piece is interesting. It is both the first time we get a set that interacts directly with the use of a capstone talent (two of them, in fact!), and it stands on its own as a unique set bonus. This set effect is dynamic, interesting, is purely driven by the player’s actions instead of being a boring proc, and actually encourages players to change both playstyle, priorities, and talent builds.
Gameplay Implications
The Elephant in the Room: The 2-Piece Bonus
The 2-piece bonus is probably the biggest letdown of the expansion in terms of set design for Blood Death Knight. Rotationally, it is extremely gimmicky, as it manages to tie every single negative element of a proc all at once together: it is a reactive proc with a short duration tied to a filler spell (Heart Strike) that can reliably hit only a fixed amount of targets (2 or 5 depending on whether you get a proc while Death and Decay is on the floor) that itself is tied to an event completely outside of your control: a boss successfully meleeing you and you losing a charge of Bone Shield. The proc chance itself is ludicrously small, the effect is tiny, the magnitude of the buff is tiny, the conditions of application with the 2-piece bonus are ludicrously finicky, and it has every problem debuffs like Fiery Brand have defensively.
This is made even worse by how other abilities also apply this debuff with a massively higher uptime potential than this 2-piece, and cause you to often waste precious procs of Death Knight Blood 10.2 Class Set 2pc (such as on the opener when playing Abomination Limb. It is a net loss to delay Tombstone in order to gamble at a 50% chance for more Ashen Decay uptime… but it sure looks appealing, doesn’t it?).
Soul Reaper
A couple of changes slipped past during the 10.1 patch and buffed the damage Soul Reaper does when copied by Dancing Rune Weapon. In 10.2, Soul Reaper gets buffed by a further 20%; while this was listed as an Unholy-specific buff on the patch notes, its implementation as a direct buff to Soul Reaper outside of spec choice is fantastic, as both Blood and Frost were struggling to justify picking Soul Reaper outside of super niche scenarios.
Our tier set seems to be intended to whammy on this even more by essentially guaranteeing 100% uptime on Ashen Decay in execute. As Ashen Decay has a default 8 second duration, and Soul Reaper has a 6 second cooldown, you can very reliably get 100% uptime on a single target just by hitting Soul Reaper on cooldown – which you should be doing if you pick the talent anyway!
The fun part is when multiple targets are close together and in execute at the same time. We will know closer to raid testing if the raid features encounters that do so. If there is such a fight, it is possible to maintain Ashen Decay at 100% uptime on 3 targets by tab-targetting Soul Reaper between targets, and letting your Heart Strike and Blood Boil passively extend them with no real constraint or rotational change outside of keeping track of which Ashen Decay needs to be refreshed next.
If you decide to play Soul Reaper in an environment with more than one target, we strongly recommend that you bind Soul Reaper as a mouseover ability rather than a target-cast ability. The reason for this is that you will very frequently juggle casts between targets (every 5-10 seconds depending on resources), and as this is the only cast you need to actively alternate targets for, it is easier to just bind it so you can cast it on a nearby target without having to select that target.
You absolutely should enable an execute target health tracker module on Plater if you use Plater. If you don’t, find a way to easily find out which targets are below 35%.
Abomination Limb
This is where things get potentially unintended, potentially very fun, and potentially very unfun yet once more for the 2-piece bonus. Each and every single tick of Abomination Limb refreshes Death Knight Blood 10.2 Class Set 2pc, and pandemics if it possible (up to a maximum of 10.4 seconds). This means that, even if you do absolutely nothing during Abomination Limb, for 22.4 seconds, you are guaranteed to have Ashen Decay on all targets nearby before you even consider the extensions from casting Blood Boil or Heart Strike (which you absolutely will do). In real world testing, this means easily upwards of 50 seconds of continuous Ashen Decay from a single Abomination Limb cast on all targets as long as you do not have more than 5 targets engaged.
Once six or more targets are engaged (or if your management of Death and Decay or your runes needs improvement), things get progressively less fun, as Heart Strike is target-capped to strictly 5 targets. As our brand new 4 piece’s refresh/extension mechanism works off both Blood Boil and Heart Strike, in this situation, each Blood Boil will extend all Death Knight Blood 10.2 Class Set 2pc debuffs (which are currently on all targets thanks to Abomination Limb), while Heart Strike will only extend Ashen Decay on the 5 (or 2 if you weren’t in Death and Decay) targets hit by Heart Strike.
As a result, we strongly recommend two UI changes if you play this tier set in Mythic+, as some dungeons have an exceedingly large number of high density pulls (Waycrest in particular). Now is the perfect time to clean up your Plater profile, or to set up Plater. Make sure that:
- Blood Plague is only visible once (not at all is also an option once you are familiar with your rotation, as you do not interact with Blood Plague directly in any way, shape or form) instead of the 1-3 copies you get depending on whether Blood Boil was cast during Dancing Rune Weapon
- Unnecessary/passive debuffs are not visible on your target
- You are able to track Ashen Decay on enemies, and be able to quickly discern copies of Ashen Decay needing to be extended slightly compared to others in large pulls. The best way to do this is to push this debuff as the highest possible priority on nameplates and to make it bigger than the rest
Build Choices
The choices and trade-offs you were used to on the Blood tree do not change much; Blood Tap once again gains a bit of power, but not enough to mandate it as a default choice, especially considering its significantly higher skill cap.
Instead, we’ll focus on the class tree, where all the fun decisions will happen.
Single Target
We chose to highlight the build variant without Blood Tap, as it forces a non-trivial utility choice. This choice is better explained in depth on the upcoming talents page for 10.2. There are two options for this – you can play what you played in 10.1.5 with Death’s Echo, or you can gamble on a significantly higher skill cap variant without it for a relatively minor gain (this can be optimized further on APL in favor of not playing Death’s Echo – it’s just a conservative minimum).
The set gameplay is very simple and does not change from 10.1 if you played a build with Soul Reaper already. Below 35%, your goal is to always keep a rune ready to never delay casting Soul Reaper while using Death Strike at least once every 8 seconds. It sounds easy, but the reduced runic power gained by sending a rune every 6 seconds into Soul Reaper complicates matters significantly.
Closer to 10.2, the rotation page will be fully updated with an in-depth single- and multi-target priority list for execute phases.
2-4 Targets
This is where the fun begins. You now have two more options in addition to being able to forsake Death’s Echo: you can forsake Empower Rune Weapon in order to pick Soul Reaper and Abomination Limb simultaneously.
This is a net gain on 2-4 targets with varying value. The goal is effectively to gain 40-50 seconds of Ashen Decay uptime on all targets with Abomination Limb, while sniping execute targets with Soul Reaper whenever possible in order to maintain 100% uptime on Ashen Decay on anything that has reached execute range near you.
We defaulted to the options with Death’s Echo for simplicity – you can easily drop it and put the point elsewhere.
For completeness, the Soul Reaper+Abomination Limb variant is currently ahead defensively and offensively in these situations, but this is only when played optimally and with some basic assumptions (long-ish fights for a decent opportunity for Soul Reaper, basically). Again – when 10.2 is released and the guides get fully updated for it, I will walk you through all of these choices in a lot more detail.
More Than 4 targets
Above four targets, it is absolutely advised not to pick Soul Reaper unless you have a significant opportunity to leverage it (such as a damage amp phase on a priority target, or most other targets being pad). As such, we simply default back to the build you were playing in 10.1, with Empower Rune Weapon and Abomination Limb as capstones.
Verdict & Closing Thoughts
Mechanically, the 4-piece is a success. It is by far the most interesting element of this set, and warrants keeping. It is mechanically interesting, promotes build diversity, actively encourages proper play and rewards you – albeit very weakly – for it.
The 2-piece, on the other hand, is the exact opposite. It is the literal culmination of everything you should not do when designing a set bonus. On the upside, the proc chance is low enough that you likely will not notice the difference if another boss like Rashok shows up, as you will literally not be losing Bone Shield charges anyway.
In terms of raw power compared to Aberrus, this set needs a lot of love to be something worth caring about, as it is significantly weaker than our Aberrus set defensively, while also being much more restrictive. Vampiric Blood had no damage source conditions, especially not when the application is strictly capped at 5 targets or on a 2min cycle. Vampiric Blood procs were also ~4x stronger in magnitude defensively than Ashen Decay (if you assume that the damage is sourced properly from a target you can apply Ashen Decay to and that it is currently applied), and while you can keep a single proc of Ashen Decay from the 2-piece rolling for upwards of 20 seconds with near-perfect play, you are neither guaranteed to get a proc when you want it, nor be able to spend it, and its defensive impact (10% damage reduction on damage sourced to the target it applied to) is weaker than any of our cooldowns.
Probably the most jarring feeling about this entire set is that, barring two technicalities (the 2-piece and 4-piece bonuses applying the same debuff), it feels like the two effects were designed independently, or the 2-piece bonus was designed as an afterthought. It, in turn, punishes players who play around Ashen Decay copies applied by Soul Reaper and Abomination Limb, since the procs they get while Ashen Decay is already on target will either go to waste due to the debuff being capped at such a low duration, or contribute in a very minor fashion to a trifling amount of additional uptime on Ashen Decay.
So, yeah. Ashen Decay is weak, the 2-piece is jarring and punishes players who play around the 4-piece properly, and this set feels rushed and disjointed. The 4-piece is really nice, though – please keep that part!
