Brute damage: raw telekinesis and force-push/crush type powers. Possible force barrier.
Burn damage: The Man on Fire from MGSV. Just on fire all the time, creates fireballs and fire walls and shit.
Oxy damage: Wind/vacuum manipulation, able to steal breath from people's lungs passively and create air bursts. Seemingly weaker, but hideously dangerous if there's a fire somewhere as they can super-supply it with oxygen.
Tox damage: Creation of poisonous foams/clouds of a mix of semi-dangerous to extremely dangerous substances.
Radiation damage: Nuclear mutagenic bastard. Walking dirty bomb.
Gibbing:
MEAT MAN
Drowning: Uhhhhhhhhhhhhhh?????
Initrobeedril: MASTERY OVER ALL BEES.
Admin intervention: Cluwne. Just a regular Cluwne. Why would you do this? What did you expect?
EDIT: The idea of a Wraith bringing back the dead as shambling abominations tainted by the essence of their own death is thematically fucking awesome. It turns a bad situation for the crew even worse when the plasma fires that claimed many lives begin to spawn dangerous fire elementals, fueled by the anguished spirits of their fellow crew. If they don't immediately disintegrate, they'd be great for creepy RP. Maybe usage of their powers causes (or at least accelerates) their degradation, so in the meantime they could have kind of a fight-from-the-inside thing.
I'm imagining each one as having a passive ability, one or two active abilities, a potential immunity/weakness, and a side effect of their death (like how wiz golems dissolve into a cloud on death).
I just love Wraith stuff. It could be so much scarier than it already is. Since I've been playing on Destiny/Clarion, my mind is on RP.