[Autumn]

Considering that as a lightning mage, all you get out of Guile is the critical modifier, I think it's fine as is. The only real issue is AoE lighting criticals from elemental impact, but that would require a different fix.

As a lightning physical attacker I have to disagree with your statement, for overload specifically, if for some reason someone has any amount of bonus stats they take thousands upon thousands of damage because of Greaper.