I found one of the easy ways to hold off for a while commandos and snipers. Held off to wave 104 with ten commandos and 5 snipers an engineer a medic radio man and officer I really did have fenchie at rank of officer no joke then an arty round destroyed it in the blink of an eye
 "Strike Force Heroes"){kind=icon}
 "Mud and Blood 2"){kind=icon}