Sideboard options

[smt8]

I'm playing a U/G Madness deck, and looking for good sideboard cards to use against ATS and G/R Survival decks. I've got Tormod's Crypts, but I'm looking for more cards to use in my sideboard. Thanks for any help!

[Aeromancer]

Naturalize to kill Survivals.

[vaeal]

Do you run circular logic? force of will? any other counterspell? Im not fluent with UG madness, maybe a decklist will help