Anyone know if blocking mitigation has been increased from 20%?

[Stormbrand]

See my above post. Again, shouldn't be your first choice to use for personal mitigation but the fact is is that you do get 100% block from it and in VERY SPECIFIC CIRCUMSTANCES I think its ok to use it (such as the above example in the Twinning dungeon).

literally better to use clemency if you going to sacrifice a GCD, so no PoA should never be used for self mitigation , its a trash ability in that regard and its only purpose is for group mitigation.