>>537974998
If you have the Dust Devils, Speargun + Coyote + Ultimatum + Incendiary Impact
>then
Acclaimed OR Medic Armor
>then
Supply Pack, Eagle Strafing Run, Emancipator Exosuit and (Something you like, i'm using the NapalmEAT because if you shoot the ceiling of a cave it's a bootleg indoor napalm barrage and it's KINO)

If you can try this build and see how it goes.
Quasar is your main AT, Ultimatum is your bootleg AT. You close bugholes with the speargun (or with the incendiary grenades).
You use the speargun even on diggers to make them come up for underground and get raped by coyote in 2-3 shots. Supply pack is for the speargun, your stims and the ultimatum. On bug breach throw a spear-shot and an incendiary grenade and repeat after 10 seconds, everything that isn't a charger, an impaler or a bile titan dies.
Oh the speargun can knockback charging chargers and vomiting bile titans, and it oneshots brood commanders so don't sleep on it.