Apparently one of the "must haves" is a Stay Frosty with Rimestealer and Headstone perk combo. I would say try to get an Avalanche with Incandescent with perhaps Subsistence or Rewind Rounds for a reload perk. I have one with Rewind and Incandescent from last year and while it is not a DPS monster, it does get a healthy work out and serves well as an add control / clear heavy for me.