If you really want to just grind it simply doing VT flaming runs with a VT Crystal Ball + Binlor Orc Wizard ought to do the trick. It plays the same in most places regardless of what else is in the dungeon and if you're familiar with it you can beat anything.
If I were looking to acquire huge piles of cash in a non-mind intensive way I'd do that (or if I wanted to think a bit I'd do Vicious dungeon PQI VT's but that has way more parameters to take into consideration, the Pissorf spam guy hardly has any gameplay).