Please make blood weapon work with magic attacks too.
There's probably some balance issue that's the reason this isn't a thing, but as it is DRK is kind of gimped when it comes to OT AoE situations. Since we're OTing we won't be getting hit much so no blood price and all our AoEs are spells so to use blood weapon we have to stop AoEing and use single target physical attacks to get MP back.
So either:
1. Make blood weapon work with spells.
2. Give us a physical AoE attack, even if it's just a job ability with 15 second recast or something the full MP heal from it on a large AoE pack with blood weapon would be enough.
3. Give DRK some kind of thrill of battle equivalent but for MP instead of HP.