fire problem (Phoenix Fire not stacking)

Hi there,
I just noticed a bad problem in my map. I've two different phoenix and two heroes which use a modified version of the phoenix fire. Three of these have their own buff, the fourth doens't DoT the enemy an so doesn't need a buff. Now all enemys can only have one of these DoTs at a time and if they have one they can no longer be attacked by the no-DoT fire. Is there a way that they get all three DoTs and even be able to be attacked by the fourth fire version?

no, because phoenix fire doesnt stack.

Maybe there is a way, if you use Poison attack [stackable] as basic ability and just add effects to it.
As far as i know, there is a way to make Poison attack stackable, i think there is one in "Neutral enemy"-Library in WE.
Just think of the berserker dude with burning arrows in DOTA, its also based on poison.

Greets

Only thing I can think of is trigger the spells yourself.

Alright, thank you guys. I'll find annother way to solve it.