After buffing purify, SoSac decks kinda silently dissapeared from higher leagues, but you might still run into them in every league (besides bronze). Although, i never used purify vs SoSac, but Antimatter on my own creatures. Now the most annoying card I keep constantly seeing is SoF. Second most annoying (for me, since I play rainbow) is Black Hole, and not "a Black Hole", but "12 big Black Holes". And about those bronze monoaether - what else can they build that will stand a chance? Bronze rainbow decks can at most be bit stronger than AI3 rainbow, but it's hard to make good rainbow with 5 copies of same card (besides pillar or nova), other good choice they have is monodarkness, or fire rush. Everything else will get swept. And they also lack cards and cash to build what they'd like.
