Spoil Victor is basically empathy*4 plus backfire rolled into one, with a minor drawback. So yeah, I'd say it's overpowered.
Some suggestions, if they have an asterik they are some I'd lean towards:
-Make it a 25 energy spell*
-Add a 17% hp sacrifice*
-Make it end after the first trigger*
-Make it a 2 or 3 second cast
-Double or triple the recharge time and/or reduce the duration to 3...7 seconds*
-Make it heal the hexed person if that person attacks or casts a spell on someone with more life than them. On the other side, maybe make it so that if someone deals damage to the hexed person, and the hexed person has less life, the person doing the damage will take the damage instead.*
-Limit its effects to attacking/spell casting on the targets foes (so a monk healing someone won't cause it to trigger).
-Have it disable the caster's necro spells for 10...4 seconds or have it disable all other necro spells in its skill group for 15-30 seconds.
-Have it cause -4 energy degen for the caster while the hex is active.
-Get rid of the recharge and make it recharge on moral boost only.
-Reduce the damage or limit it to a certain amount that would end the hex early.
-Have it clear the target's existing hexes or conditions and/or stop any more hexes from being cast on him while the hex is active.
-Give the hex to the caster as well as the target.
-Make the hex trigger only when attacking or casting a spell on the caster of the hex in addtion to needing the caster to have less life than the target.*
-Give it a 100% blood sacrifice.
