Might be an interesting Kamikaze build. It would cause damage even if they killed you too. The damage is to small you are right. To bad it can't stack. I invisioned running to the opposing teams base and spamming spirits then letting them kill me. Then SURPRISE you are all dead, while 1 of my team members stayed behind safely out of the rituals range. Ahh the joy I would of found in killing everybody in the HoH except our ghosts.
Ohhh, well.