Originally Posted by
Tiberria
Honestly, almost all Mythic raiders should just focus their gearing attention/gemming, etc on min maxing Mythic raiding. The Mythic + gearing rewards cap out at level 10, and that is a level that should be reasonably trivial to reach within a couple of weeks, especially given that Druids are pretty much the unquestionably "BiS" 5 man healer. As long as you can hit Mythic+ 10 with mythic raiding optimized gear, there's no reason to go for some weird "gearing compromise". Anything above Mythic+ 10 is just for bragging rights/cosmetic stuff.
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I think it's kind of common sense why mastery would be the top stat in a Cultivation build in a raid environment. I don't see what trying to use an addon that is built around 110 design, and doesn't factor in our HFC set bonuses, etc. is going to tell you of value if you use it on HFC fights. There are HFC fights other than P2 Tyrant that has the health pool levels needed to make Cultivation viable anyway, and if those damage patterns persist in Legion (seems unlikely), then yeah - Cultivation will be moth balled as a talent.
1. If you don't have targets to heal that are <60% HP almost all of the time, you're not going to be using Cultivation to begin with.
2. If you do have the <60% HP targets, and take the Cultivation build, it stands to reason that the bulk of your output is going to come from Rejuv spam, with WG usage de-empshasized (due to mana constraints, etc.)
3. In that situation, you can guarantee that all of your Rejuv healing will get at least 2.0 mastery stacks from Rejuv+Cultivation alone. You are already guaranteed that your LB/primary tank healing target gets at least 2.0 stacks (because you will be keeping Rejuv on him). At 2.0 stacks, Mastery is nearly 20% better than the other secondaries by default.
That means that you are getting a significantly higher gain from mastery on the most important part of your healing (i.e. the targets that you are focus healing) than you would from any other secondary. The downside would be your WG healing (but you aren't going to be casting WG anywhere near as often in a Cult/Rejuv build), your Efflo healing (probably mitigated somewhat by taking SB), and your Tranq healing. However, I don't think any of that is enough to offset a nearly 20% gain on the player target focused portion of your healing kit.
The real question with Cultivation will be - will we have people at low enough health for it to ever to be worth taking that build. While raid testing logs/numbers suggest it may well be the case, experience with how gear and player power scales when an expansion actually goes live and people actually have viable fight strats makes me skeptical.