One idea would be that set bonus could give you some type of proc when you complete the set, like armor break that stacks, sewer staff could give chain lightning that damages nearby enemies, stun, or life leech.

This could make set bonus something more than just stats. So you could get some h/s, m/s, damage and the other stats normally associated with sets.

Also mages need their enchanted gear to be fixed since h/s is useless for us and warriors need dodge not damage. If they wanted damage they would go for dex gear. Birds is not that bad but they could use a little mana regen here and there.

Also a change for the crown of persistence for the mages, we don't need h/s we need m/s please change that. I am saying this because of all the stats they could give us h/s is the most useless of all. I would prefer m/s, dodge, hit, crit or more damage and not a single h/s.