I used Tacticians Emma and Strange, Scrapper Agent, with Signpost, Scroll of Melsalam, Faulteater, and Magnetic Shield Generator. Spammed Signpost every round, even though I hate it and think it's cheap. If there was any chance Emma could stun the enemy Agent and deny his/her first turn, I sent her out to try. Basically played the ugly damage-over-time game while trying to keep everyone alive until the other team fell down.
I tried Hoarfrost Mace for a while, but all of the Ghost Riders kept killing me.
Late in the game, in the higher ranks, I saw a lot of Grey Suit Widows (Tacticians with the Infiltrator bonus). Mockingbird is getting less popular, and I didn't see many Caps either. Emma is perennial.