As a PvE disc priest, I love the T8 4-pc bonus. It's pretty much a flat out 250 spellpower increase, it's almost always up. The T9 bonuses seen pretty good, but I still like the T8 better. At what point would it be worth it to start upgrading to T9, losing my bonus? Also, about the 4-pc T9 bonus...it the 10% increase to divine aegis a 10% increase to each shield, making it 33% of every crit, or another 10% of each crit, making it a 40% shield?