Firstly, I would swap out the black in the angelic accord deck for green. That way, you have access to brindle boar, at least. It will also offer up some diversity, as you have I believe 3 decks with black in them.
Okay, totally doable. You like the brindle boar sacking method better than the festering newt/bubbling cauldron/bogbrew witch combo?
If you're going to include Garruk in the beasts deck, i'd suggest putting one of the walkers into every deck to even it out, or take garruk out. I feel that having a $20 PWalker is kind of cheating when the objective is to play casually.
If the end goal is to make the beast deck a balanced opponent of the other 7, would removing the Garruk immediately balance the decks, or make the beast deck too weak? If too weak, what could I do to beef it up to the others.
Or, is there a way to weaken the beast deck while keeping Garruk in there (taking out the windstorms, plummets, fireshrieker etc.) to better balance the decks?
Other than that, I think you did a pretty good job here.
Thank you for the kind words, and thank you for your feedback.