You want ridiculously easy, play a Conjurer with one Destruction element powered up and dual-cast healing spells. You literally can't be killed by all but the strongest enemies en masse. The only challenge I had was right at the end of the main story, when I got assailed by 12 Dethlords. They kept one-shotting my atronachs. That was...until I started raising the dethlords I had just killed.

Bound weapons will banish anything, and even a powerful mage is easily overcome by dual-cast fireballs. Then resurrected as a Dead Thrall

I took nothing in Smithing (though I did abuse enchanting).