so here is my idea
Final Shot(maybe different name) attribute expertise
10 energy 30 second recharge
Elite attack If this attack hits it does +13...30(35 with 16 expertise) damage
if it hits a foe below 50% health the damage is doubled after you make this attack all your skills are disabled for 20..10 seconds(7 with 16 expertise)
(75% chance of failure with expertise of 9 or less)
this skill is meant to finish off the target fast but your skills will be disabled for a while...input please
...heh i can imagine the boss you cap this from doing 400 damage to a enemy below 50% krazy faction rules..bosses shouldnt do double damage lol