Solution - I'm upgrading my Monte Carlo tonight. Don't buy the hype it wrecks in PvE, add high caliber and it can perma stun low level dudes.
Of course a nice handcannon is always better
Monte Carlo is not the lowest impact, highest RoF AR like Atheon's Epilogue and Dr. Nope. It has slightly more impact and slightly less RoF.
Stats wise, the new Vanguard Up for Anything and Monte Carlo are actually suped up Shingen class ARs. Same RoF/impact. And everyone loves those!
I got an Up for Anything with a great perk roll and it's been fine for PvE. It'll have to do until I get a legendary hand cannon that doesn't suck.