Yupp not a tipical RPG, MMO set here. Your dark knights is a Necro, the best support is a Barb or DH, best pet class is Monk and DH, best single target dmg dealers is WD, best trash killer is Sader and Wizz, and there are some overlaps, but when you played the game enough you’ll get to the roles quickly. It’s not about the vibes, it’s about their best builds.