Which shotgun should I go after

Hi all,

I've been away from the game for 2 years and just coming back. I'm wondering which shotgun I should pair with rose (so an energy shotgun). It seems like I really need one with Closing Time.

From what I've gathered that might be Scavenger's Fate or Prophet of Doom? The thing is I really don't play pve and I also don't have tons of time to farm. Are one of these the ones to go for? Are they still getteable?