So doing the math here, on deciding when we should cast Vivify over effuse.
It seems without being particularly mastery heavy (I am at about 4394, with 26728 SP), with 20% increase to Vivify and 3% increase to Effuse, these are my numbers.
My HPM for effuse is - 5.42
My HPM for Vivify per number of targets is,
. 1 target - 3.13
. 2 targets - 5.07
. 3 targets - 7.0
All this changes with the Vivify proc to,
. 1 target - 4.38
. 2 targets - 7.1
. 3 targets - 9.8
(this is all based on the assumption that mastery can crit)
This being the case, it seems that the only time it is better to cast Vivify over effuse (assuming no immediate danger of someone dying exists) is if there are at least three targets below full health, or two below full health if the proc is active.
This seems different than what a lot of people have been saying, that effuse is rarely cast. It would seem that in periods when everyone is topped off and the tank is the only one taking damage, effuse *would* be the only heal we would cast.
Sound about right?