I've been playing for half a year now and I've noticed that the game is geared towards a closed rotation of flying aroundin about healer. We have a good tank that lacks skills to reduce enemy.armor. There is a gap between classes. There is a gap between classes. To fill this out, I propose such a solution.
Cleric as a Tank role using skills for get better start/basic stats than other characters /Tank
Barbarian, use taunts and abilities to immune and immobilize enemies /DD
Berserk, use taunts skills and mantras to get attack speed based skills, /DD
Druid for stand battle totemns on battle area, /Tank/Heal/DD
Shaman specialized in feel power from incarnate animals and use sigils, healing staff basic on HP % per use ability /Tank/Heal/ lesser DD than others
Warlock, use crowd ctronol area effects skills, curces and olcultism skills /DD