Originally Posted by
Koor
If the criteria is the highest average hps, yes we'll need people to be low often for mastery to pull ahead of crit.
But looking at the average hps is the wrong criteria to use.
Even if people are low few times during the fight, mastery is better than crit for those heals. It doesn't have to happen all the time for mastery to be valuable, since when it does happen, mastery is the better stat to save them.
And this is without even considering that crit is RNG based. In SOO gear it's hard to get even 40% crit. Even if we get to 40%, there will still be 60% chance that a particular heal won't crit at all. Mastery on the other hand is not based on RNG. Therefore it always increases the size of the heals on low HP people, there is no RNG involved.