I agree that the 3rd tier is questionable at the moment, especially since Mindbender still looks so out of place there for Holy/Disc. But for the 5th tier, it looks fine to me. Twist of Faith is better for bosses like Chimaeron where it's pretty much cruise control until you hit the execute phase where things get more serious (or for healers, everyone is sub 20% all the time). Outside of having a critical execute phase, Divine Insight is better, especially for Holy which gets improved AoE function for PoM. As for Power Infusion, there's just really no comparing that to the other talents, specifically because it can be used as a buff on other members.