My Favourite Tactic is to use 4 or 5 teams of two, with each team having a rookie/squaddie and officer or N-C-O. Glancing at the stats of each team, and the mission requirements, I decide the equipment - if I need an AntiArmour Team, I give an officer the rocket launcher, with a pistol and rocket in his backpack. His assigned rookie gets a rifle, and backpack full of rockets, and support items like med kits and smoke grenades. A Scout team would have a rifle rookie, and a pistol wielding, motion scanning officer(even though switching their weapons would make more sense..). Occasionally, I might just kit out a team of 4 rookies, with rifles to lead the main offensive - not using them as cannon fodder, but as non specialized troops...