T50 IS easy.
An unupped deck can win like 75-80% against them.
again ... this deck (
http://elementscommunity.org/forum/index.php/topic,5618.0.html) had a stable 90% win-rate upped when I last tested it.
Even the unupped version is currently at 90%. This will probably not stand since the sample size is still too small to be conclusive.
I'm using my own deck, aether-death, fractal, ball of lightnings, bone walls, vultures and phase shield.
And if the false gods were easy, people wouldn't be using a standardized deck to farm them.
Personally, I dont really get why people stick to the rainbow-build so stubbornly.
I haven't played a rainbow in ages and had a lot of (very profitable) fun with other decks.
I can tell you though: If the AI gets it right, facing a Hope-deck in the T50 can be a very frustrating experience, compared to which the standard rainbow-stall pales.
As for your deck:
Have you fiddled with adding Plagues, Aflatoxin to it yet? If FFQ bothers you, then why not react to that fly-spam accordingly?
In T50, you are in the unique position to more or less know the opponents deck. Tweaking a T50 deck to exploit the expected rainbow is thus the most promising strategy.
(compare the abovementioned deck which "in your face"-heals via blackhole)