All good tips that I'll have to try, but what do you guys do for boss fights when they just wipe out Skeletons in no time flat?
I really don't know what to say beyond "dodge like a champ", which applies to every character. I don't use thunderhead, so my damage source is my staff, and I save my spellbooks for crowd control.
I abuse air charged spells like an elf abuse charged shots. Like, jump>charged o>d.jump>charged o>dodge>charged o>dodge>charged o>air dash away. On some bosses this chain can't be so long, on others it's better to use ground spells or snowflaking (charged up+circle with ice staff), but being on the air improves survivability and there's the damage bonus from levitation.
You can cast create food for more skeletons mid-fight, too 
