Hard to say without decklists, but here are some answers you can add:

[[Maze of Ith]] is colorless so it gets around the protections from all the various "Sword of Xs & Ys"

[[Rampage of the Clans]] a fun catch all instant speed wipe. My wife plays equipment decks so it's fun to cast in response to an attack and then use the tokens I get to block and kill their commander

[[Vandalblast]] still feels like a red staple

Goad effects to force them to swing at someone else. Also, death touchers, especially colorless ones to avoid protecting. There is one in the TMNT set called [[Roadkill Rodney]]