I believe I have crafted the ultimate bugz loadout.
>Light armor
>Torcher
>Ultimatum
>Braap nades
>Supply pack
>Stalwart
>free slot
>free slot
Torcher kills mediums and thick hordes, Stalwart kills hunters/stalkers/distant hordes, Ultimatum kills heavies, and gas grenades closes holes and retardifies bugs I can be bothered to kill. Supply pack keeps me topped up on Ultimatum shots and grenades.