The idea of a mutant type CIA sounds good to me and if we combine that with a proactive strike force it seems golden. My roster would play on the current state of things though
Magneto.
Emma Frost.
Mystique.
Exodus.
Unuscione.
Warpath.
Domino.
I kind of want Betsy Braddock. Archangel. Gambit and Rogue tied in to the squad as well