Also, this soooo won't help on FFQ. Oty + quint is enough for most gods, no need for 2 useless cards only to play a god which will most likely defeat you anyways.
FFQ relies on FireQueens and Eagle Eyes, which both are 3/7 and 7/7 in atk power/hp, if you put out a gravity shield, only creature you need to worry about is the fireflies generated.
This method proved quite useful to me, though firestorm method with bonewall which most people prefer to use is perfectly fine too.
As for the Rainbow, well for me personally, I just like the challenge.
Regards,
Mashimaro.