Okay, but I'm not sure If I can do multiple buffs for the hero but yeah, I could try doing it that if the hero has two target, his buff will should the number of targets he has instead of actually two buffs. So, just making sure, each target has that 15 seconds right and the agi bonus from one of them will be removed but if the other still has that 15 sec, agi bonus from him will stay?
BTW, does Hell Raze's cooldown activate when the user dies?