Not really false god specific, but a lil modified version of speed rainbow is easily able to beat Destiny. I mentioned about 1 minute ago as i was EM-farming t50 and misclicked to the FG section...
Proof:
Deck:
6qq 6qq 6qq 6qq 6qq 6u3 6u3 6u3 6u3 6u3 6u3 713 713 74f 74f 74f 77g 77g 7ae 7ah 7dm 7dq 7gm 7ju 7mu 7q4 7q4 7tb 7te 80g
(http://imageplay.net/de/view/m7Gbd71581/speed_rainbow_fg)
I can concur that a rainbow-rush deck can beat Destiny, I use a deck similar to the one posted, though mine is based on Terroking's version. I used it when I saw on the Oracle that Destiny was my false god for today. However, I use Electrocutor in place of Discord and an Ulitharid instead of the Crawler.
I suppose it may be situational, but the rainbow rush can win provided that you have a sufficient amount of quanta stored up and an electrum hourglass out- the rewinds can only slow down the re-casting of creatures and with the hourglass you can avoid being stalled. I doubt however that this deck will give a 100% success rate, but I think it has a fair chance with a decent draw.