I've been wanting to create a blood mage but I am totally worthless with the TL2 editor.
I think it would be really awesome to have this dangerous mage that uses his enemie's blood or his own in dire situation to create weapons, whip his enemies or even absorb it to gain strength.
It could be a dangerous class to play since you'd have to use your own health to cast your skills but that would make it so worth it.
I would have made the trees Blood Magic (like Vlad from League of Legends), Blood Weaponry (solidifies blood/watery magic), and Flesh (kind of like improved physical aptitudes due to being able to use blood more efficiently in his own body). I had all skills decided but when it came down to realizing it I had to face the fact I'm terrible with creation engines.
Just leaving this out here in case you need inspiration!