I upped my hp and mana, disabled cooldown on fireball, made swarm super fast, gave myself skills from other classes (like any weapon I want, heavy armors, weapon skills, lockpicking, stealth, blah blah), used some custom spell mods, gave myself 999 backpack slots, used a mod that made it so blood magic wouldn't come off after all the mobs were killed, used the maintainable buffs to get hp or energy from corpses, etc...
And anyways, I liked the lore and visual effects of the blood mage more than anything. But, I made them epic.