Well, 'easy' is relative, as you still have to survive long enough to hit level 50. But, this *might* work. I'm unsure if anyone has tried it, as I haven't seen anything to the contrary.

1. Get level 50 for the special 'cheat death' Necromancer special.

2. Learn Wish, from the book. (blessed stomafilla herb while satiated)

3. Equip the Chaos Orb of Elemental Earth (+10 Toughness)

4. Bookcast Wish with zero regard to HP/PP. You'll die, but because of 1. and 3. You'll come right back.

In theory, this should allow infinite wishes. However, I don't know if it would work in practice. I don't know if the actual spell goes off if you fully exhaust yourself casting it and die. Anyone know?