Here's a pretty basic strategy:
1. Use Binlor upstairs for piety, and all the boons you want from him.
2. When you get downstairs: buy the Tiki altar, convert, get poison, use Consensus, buy the taurog or mystery altar and convert.
3. Continue until you have used all of your potions.
4. Buy and convert into Drac or GG. If you will need mana restore for any bosses, use GG, otherwise use drac.
I speak chaos.