poison arrows stacking with barrage..?

ok, i know there IS a way to do this cuz i saw it in a map, i just dont know how
i got a multishot ability based on barrage, but when i buy a poison item which is based on either envenomed arrows, envenomed weapons or item poison bonus, the multishot is canceled and he only shoots 1 arrow

how can i fix this?

Ok I know what people will most likely say: make a dummy unit that uses this. So therefor do that. =) So whenever the tower attacks you create a dummy unit.

If the problem is that poison doesn't stack with barrage, than you would need to create a dummy unit for each targeted unit and have those attack instead of the tower.

Lol!!! I knew you would say dummy unit ^_^

no way man, im not using it on a tower im using this barrage ability on a unit
i saw in a map that it works, it has no dummy unit..
i think it has to do with the "attack index" but i dont know exactly what

Since both Barrage and any Poison-related ability are both attack-enhancing skills, they won't overlap. The only way to simulate it would be to use a trigger to create dummy units that make extra projectiles. These units are never actually seen on the map, and the end result is that it looks like a multiple-poison shot.

Alternatively, you can easily make the projectiles for Barrage use a Poison Arrow model. No poison would actually happen, though.

there!
i fixed it
i just used orb of venom attack index 0..

but it seems that whenever i add a poison sting effect, it wont work

ok, now it works perfectly when adding the slow poison ability :D