Originally Posted by
Tiberria
You're not going to have Rejuv on anything close to most of a 20 man raid. Even with 20% haste and mashing every GCD, it would take 24 seconds to cast 20 Rejuvs, and of course, some of them would fall off by the time you get 20 out. The theoretical maximum number of Rejuvs you can have out at once is 15, and even that is not realistic, because you still need to cast WG, keep LB up, keep Efflo down, use OOC procs, etc, etc. The realistic number is closer to like 8-10 at most.
Tranq is not a HoT, and doesn't add a mastery stack or give a mastery stack. It basically gains no value from mastery outside of targets with HoT stacks already on them. Probably 75%+ of your Tranq ticks will be on targets without any HoTs on them (you won't have them on everything and some will wear off during Tranq's channel). A good amount of your Efflo ticks will be on targets without any mastery gain/HoTs on them too, because of the random nature of it. You can counter that by taking Spring Blossoms so that repeat Efflo ticks will have a mastery gain, but that burns a talent selection and prevents you from taking 2 minute Tranq. Wild Growth also has random injured target selection, so there is no guarantee that it will go on targets that have a lot of HoTs on them. Yes, it will benefit from a single mastery stack always, but any more than that is pretty random.
The other problem with current tuning is that our mastery is weaker than every other stat (including Vers) except on targets with 3+ HoTs. You basically need 3 HoTs to be better than break even/gain anything from stacking/having mastery. We don't have all that many HoT effects. We have Rejuv (and it's looking like Germination will not be a default talent selection), we have Wild Growth (random target selection), we have Lifebloom (limited to 1 target), we have the Regrowth HoT (expensive as hell and not something you will cast just for the HoT effect), and we have Cultivation or Spring Blossoms if we end up taking those talents. Other than that, the only other way to get mastery stacks is taking Cenarion Ward (30 second CD, 1 talent) or use Ironbark on a target (90 sec CD).
The reality is, we don't have the ability to spam HoTs all over the place at anything close to the level that some people perceive we do. On non tank targets, it's basically just Rejuv most of the time, and then WG if they get targeted randomly by it. It's an exceedingly poor mastery when you actually sit down and think about it, because unless it is balanced around 1 mastery stack being on par with other stats, the amount of healing that doesn't gain anything from it guarantees that it will be the worst stat for raid healing by a wide margin. We also need 2-3 HoT stacks before our mastery healing is on par with other healer masteries for the most part. Point blank, this is by far the worst healing mastery in the game in Legion and I wish Resto Druids would stop defending it.