After much testing I think I finally found another effective T50 farm deck (sort of a knockoff version of Eternal Phoenix):
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7dh 7dh 7dh 7dh 7dh 7dh 7dn 7dn 7dp 7dp 7dp 7dp 7dp 7ds 7ds 7ds 7ds 808 808 808 808 808 808 808 808 808 80i 80i 80i 80i 8po
It looks ineffective doesn't it? Well test it out in trainer (elementsthegame.com/trainer.html). It can easily dominate all CC with the phoenixes, Brimestone Eaters and Cremations fuel up the Fahrenheit. Simple, effective, fast.
Phoenixes will NOT work unupped. Brimestone Eaters help a lot but they do NOT have to be upped. Everything else doesn't really matter as much.