No, what I want to create is a deck that spawns Skeletons to make mutants...
Well, skeletons don't make mutants, they make random creatures, but I get your point.
If you want that, you should go for other strategy.
Killing creatures with Plague should be faster, since the Pharaoh/Scarab combo takes forever to set up, and by that time you'll be dead or you could have already killed all your opponent's creatures with Plague.
You should add 6 Reverse Time, since no-Eternity draws can happen, specially since you only have 3 of them.
SoG's are kinda filler, but I think you should finish establishing your base strategy before adding any other stuff.