Suppose I'll edit the Ultima and Wind Set in, including your missing two, since I'm not really playing any more and don't feel like hiding them any longer.
So, seeing as the Hell vs Heaven Revolution page got taken down, I figured I'd post most of the combos here. So, yay necroposting, I guess.
Edit: Added in Wind Set and Ultima.
Angel Fire - Orb of Fire + Nature Stone
Angel Ice - Orb of Frost + Nature Stone
Angel Lightning - Orb of Lightning +...