^ The point of Desta is that it's cooler than Baret (IMO).
I have one Desta and one Brella right now. I'd have two more Destas except I lost one to the rollback and another became a Neptuline. :/
Shotguns are great, I use them against small and medium enemies. My friend and I both have gunner alts and between the two of us nothing can get through our wall of shotgun fire.
(Well, nothing that can be flinched anyway!)
I only have one 31+ bullet (lightning) but I'm working on ice right now (it's level 22 at the moment). I also use Chamga (charm) just for fun (I love those little hearts!).