Buff happy definitely a lot harder to keep in check, but still doable. I've beat nature with it in the past and they have wildfire and stuff, it's more about tall creatures than wide buffs, and Pacifism can really help with that and Imperious Smite.
Probably could add a few new cards to the deck with addition of Aegis to set all creatures to 1 strength. I used to not like that card as it would undo all the work of setting everything to 0, but now 1 is just as good as 0 with Aegis!