This ability is STRICTLY MEANT to break up mobs. So why don't we actually make it true to its name. Proxy det will only do damage if there are 2 or more players in it's vicinity otherwise it doesn't do any damage at all. Easy fix to make a skill that is intended for zerg control, about zerg control... oh and remove the AoE.
You know, there's any way to interrupt it, there's isn't any way way to get it off you, there's isn't any way to negate sorc shields. ESrObes man.