Aww crud, I kinda forgot that PLAYER* probably doesn't fire for raid units... Still, UNIT_HEALTH does feel like the wrong event, it fires quite a bit and this is not really neede for dead etc. I'm not sure UNIT_HEALTH is used anywhere else, health uses UNIT_HEALTH_FREQUENT nowadays, doesn't it? On the other hand, it fires for becoming ghost as well, so no need for UNIT_AURA
Thanks for all your help!