[Noxid]

How about this? Each extra projectile that comes out of a voidgate causes that voidgate's duration to be reduced by 1?(voidgates have a duration of 5 at max rank. 6 if there is a spirit for it) This would mean you could setup lots of gates to fire into each-other but once the damage has been done the gates will be gone and you wont be able to simply do it again next turn. So if a VA started fraying too early the gates would be used up but if they wait too long then the gates will only have a couple of shots in them. It should also cut down on the amount of gates too solving the long animation problem.

Also I'd like to say this is not OP in PvE at all considering the amount of setup it requires you'd be better off just playing duelist and just one shotting enemies with basic attacks or just lol earth mage.