[BLM Suggestion] Raise spell using Foul stack.

[Seraphor]

That would mean they'll reduce BLM dps though cause free raise (albeit 180s). I wouldn't want that!

Exactly.

The only possible utility the BLM should get is a limited magic vulnerability debuff.
Similarly to SAM and it's slashing debuff.

Perhaps tied to Blizzard II or Freeze.