I'm playing (the) Commando and have found it to be quite alright (difficulty wise). At your level I had points in Impact, Healthy, Preparation and Phalanx shield. My playstyle involved throwing down the turret to agro while criting everyone with a sniper.
But i dont want to use a sniper rifle as a commando i like Assault Rifles and Shotguns as my primary guns like in Borderlands 1. maybe Gunzerker would fit my bill for guns a blazing all out run and gun. but i miss the ability to shoot enemies with my gun to heal, heal with grenades, turret heals and ammo regen from turret.
i wish they would have carried some of that over for the commando not the siren