Mana Shield (Not MFB)
Mana Shield in the Arcane Mage tree seems to be quite ineffective in PvE content. It's good in PvP because the damage dealt against players is so much lower than NPCs so the absorb works well but if you get hit by a NPC in a raid the mana shield offers very little utility.
The final rank of the spell gives 1.1k absorb but doesn't scale off anything. I think with the talents and REs I got it up to like 1.5k absorb but it still feels like a waste of a cast. Could we please get some scaling for this instead of being a flat amount? Like maybe make it scale off arcane spell damage... or just Intellect in general if you don't want to be too specific. It seems counterintuitive that a fully t5-geared caster has the same absorb from this spell as a fresh 70 with no gear.
Since this absorb comes BEFORE armor or spell mitigation I feel like a 5k absorb would make it worthwhile in PvE and then in PvP just nerf it by 80% back to the ~1k original amount.