Best gloom bug loadout is
Halt
Ultimatum
Thermites
Supply pack
Normal GL
RR
Autocannon suit
Any light armor you want

Orbitals, jets, and turrents really arent needed.
Halt flechette is medium pen so you can kill the majority of the new bugs and stun is light pen for stalkers/big groups you can GL.
None of the bugs rush you like predator strain so you dont really need anything else
RR and Autosuit are for hive lords and dragons. you can toss extra RRs in the open if you want to fight it and team reload swapping extra backpacks to blow them up.