you can stand in front of where he's shooting and he will shoot a different target so as not to hit you. basically if that's the only enemy left you'll hear his shots but he won't actually hit the target if you stand right where his bullets hit. also I'm not sure what you're farming for that is taking 9 hours but good luck vault hunter!
Farm in spots that have high varkid spawns. Look up how long it takes for each varkid stage to happen and any varkid that doesn't go into a pod when its suppose to just kill it cuz if it doesn't evolve when its suppose to then it never will.
This is why Caustic Caverns is better, otherwise waiting until Mordecai's no longer in Tundra. I feel that pain. Could also do Creature Slaughter Round 3. Ult Badass Varkid guaranteed
I later got another vermi to spawn at the farm house but some buzzards spawned in and well lets just say the train stole my kill after vermi tried attacking the buzzard and following it.
I'm not speed hacking. I'm on ps4 and using a glitch to get whats called a false kill skill that activates and stacks one of my characters kill skills permanently.