That setup depends too much on the graveyard/fallen elf; if even 1 of those is removed, you can't get the mutants. I usually only use the elf to mutate and then reverse with the eternity or to soften it up for the otyugh.
I can agree with your other statements, though.
As for scaredgirls' deck, I'll pass; while an anti-god deck would definitely work on lvl 5s, it gets boring.