Hmm, after reading through the wargear section again I think that the medal that allows you to redeploy a unit 12 inches could be great for catching infiltrators. I'd think that combined with stitch's idea of an AP4 powerhouse squad and a scanner could be very tricky. Maybe give them a clear place to put infiltrators and leave it "unprotected", only to have them jet over by it when redeployed. Since finding an infiltrated unit scanning gives you a free round of fire
at them could be very interesting.