If you're interested, the Power Hungry wiki page has now been written. It documents in detail things like room generation, power formulas, and strategies. You can access it here on the Martian Melee Wiki.
(P.s.) PSA: It seems we've missed a parentheses in one of our formulas. Shields and toughness will INCREASE damage taken by enemies. Until this is patched, avoid using these items. —Finnfert Co.