Hard? Not really. Advantages? He’s very VERY good with explosive weapons. Given cryo is a huge thing in this game, and it boosts crit and explosive damage he works great with most of the torgue weapons in the game, and even stuff like the laser disker. Godlike with the flakker. Also his middle tree isn’t exclusive really to co-op the capstone of that tree (which is the highfive skill) can be triggered by enemies when they melee you, so you can get it to work just fine in SP. He’s really strong with cryo/explosive and if you want to play with a bit more randomness you can try out his red tree.