The skill is 'Rage' it is meant to be buff and therefore nobody should be able to use it as a debuff, it defies its concept. For debuffing resistances we had 'Oath of desecration' if I recall the name correctly. It was a nice skill and even nicer in the high tier form, where you could try apply it to a group of enemies. But this is the difference, you could 'try to apply' but they could still resist. But you can't resist against 'Rage' because it is treated like a buff even if used a debuff and buff always get applied.
But true, even if made friendlyonly it could be still be to strong. Therefore my suggestion would be make it last longer again, but don't make it guarantee crits. It should support crit-builds, but not make them redundant.
For Warlords my suggestions remain: Either making it only give 1 AP per point or just make it trigger only once per round.
