>>532296789
>groups and spawners
Eruptor or Crossbow. More than enough ammo to last me for days.
>heavies
HMG. EAT. RR. Commando. Quasar. LC. AMR. Railgun. AC.

Secondary of your liking, grenade of your liking.
Need only 1 stratagem for heavy units, everything else is just to make things more easy than they already are.