Have all 3 34 so I can defend any and all and tell you what parts of each are cheap in crucible and what classes are good/suck in PVE. Short story goes sunsinger, defender, Bladedancer will always be better for PVE in most areas. Gunslinger will always suck as the damage even with nighthawk is like two Gally shots. Very meh and no other useful abilities like invis. Hunter will always be the easiest to get a high KD with in crucible as seen by the top 100 pvp players in destiny tracker being 80 hunters pretty much. Sunsinger will always have a slightly OP melee and great grenades for trials. The Titan is pretty fair the only time shoulder charge seems OP is against scrubs who don't even know how shoulder charge is charged or its "cooldown" lightning grenades can also be great but take not only a good throw but luck with the way it angles on the wall.