Just a few I think would be a nice change up and add some depth.
- X% damage divided among all enemies.
(I think this skill would open a lot of tactics especially with AW)
- X% chance to nullify attack against nearby allies. (For instance if 1/3 chance then 1 get out of 3 could get blocked and count as a miss. Not sure if skill should apply to special also)
- Reduce all enemies Mana by X% and increase allies Mana by same amount.
Just some ideas I thought might be fun.