By that metric, the majority of Skills are useless. The discussion concerns which is the most useless. Apotheosis is still useful, even if it's rarely used because the game is ridiculously easy.
- Blood Rain is pretty stupid.
- Snipe is so boring and restrictive considering the level requirement.
- Bleed Fire is trashy.
- Aportation in combat, lol.
- Terrain Transmutation is pretty bleh.
- Sabotage is derpy, but an interesting idea.
- Corpse Explosion - Does no damage and hard to land.
Handful of skills there that are borderline crap, made worse by the fact that memory tax is a very real thing and this game hates you having multiple skills.