SPlat is a pretty good one for platinum. Poison dials, rainbow control, and to a lesser extent, cremation rush, can do alright. I've also had quite a bit of success with a SoSebow I created for myself; 6 supernova 6 serendipity 6 precog 2 SoF 1 Mindgate (just for fun) and the rest quantum towers.
Anyway, the reason I looked at this thread was to ask my own silly question:
Is it possible to mutate something and turn it into a fate egg? I can't recall ever seeing that happen before. Example: cast mutation on a horned frog and have it turn into, say, a 1/2 fate egg with ablaze. I was thinking about how hilariously awesome a fate egg with grow or devour or something would be, and then realized that I can't remember ever seeing it before.