also, you not only need all those dummy auras, you need to detect if the units have the positive form ( which becomes a big issue, cuz when the negative overwrites the positive then its hard to tell when you should remove the negative again. )
Yeah, you would need triggers for that aura. And if you looked for both positive and negative auras, that would be a huge headache. In that case, just stick to positive auras. Those are the default ones anyway.
At least now I am getting a bit better at triggers and stuff, this could be all made into one trigger if I took the time, but I would need alot of if/then/else, ands, and ors @.o Bah alot of work... Too bad I don't know anything about JASS