Scout rifle with explosive bullets and you’re good to go, bring erianas for in between when it’s stunned. Make sure scout is always reloaded so you can always stagger(have to have the scout perk too overload or whatever on gauntlets) you’ll begin to get it. I wasn’t able to grind all morning but I did last night and was able to get to around 1238 and beat the 1250 lost sector. Unfortunately I got an enhancement core lol, then had to get off. Good luck!