Actually, if you do the calculations on Minstrel healing, more critical rating is more power efficient than more ICPR at the current relative strengths of the two buffs. Minstrels have a trait that allows us to overcap our crit heals by 10%. With a Captain crit buff, I have about 20% crit chance, which is a 30% crit heal chance, meaning that more than one in four of my heals are crits. I have another trait that increases the magnitude of my crit heals, too. For every heal that I crit, that is one less skill I have to use, which is incredibly more power efficient.
Originally Posted by Jeremi
Think of it this way: My heals cost the same amount of power no matter what. With a Captain focus buff, I'll be able to use one extra heal per minute. With a Captain crit buff, I'll need to use at least one fewer heal a minute, which ultimately saves me more power.
Example: I crit an 8k Bolster Courage on my tank. OR, I don't crit, and have to use Bolster Courage 3-4 times at 2k each to top him up, meaning I can't spot heal others in my group taking incidental damage while I'm inducting.
The reason that Minstrels used to ask for Focus instead of the Crit for their buff is that we used to have no power return skills and we also didn't used to rely on crits for the majority of our healing (both changed with our class revamp with Isengard). As it currently stands, even the very worst Minstrel players in the game who have no idea how to use our (many and very good) power management skills will still benefit more from a crit buff than a focus buff because ultimately, critting on heals is more power-efficient than having extra icpr.
Narlinde, level 100 Minstrel, Rank 11, Member of Trucido ~ Windfola