Depends on if you’re running them in transports... but in general, max squads are best. Gives you the best chance for reanimation protocols to activate, because you can only use it if a model from the squad survives. If you take 2x10 man squads, if an opponent can stack 10 casualties onto one unit, no
RP. But if you have a squad of 20, then after 10 you can
RP, gettting a few back, and then take 10 more... and get a few back. With a big squad of 20, it’s not impossible to get an extra 8-10 Wounds back with
RP.