Zhakara, the lvl 50 Dark Elven Wizard starved to death while bookcasting Wish, in order to become an Archmage .
I was almost there.
Learned a few lessons though:
1) 3 castings of Wish will get you from 990 castings to 0.
2) Even though you're not hungry, you will starve to death when bookcasting Wish from HP. I think being bloated should help, but i'm not sure.
3) RNG is a bitch - no armor of power, all the useful rooms where pretty deep in corrupting areas.