i think this game is made for "only 1 mastery" for european chracters.
you can see in armor selection, that its made for teamplay, balanced to eachother.
in my opinion that game is made for:
warrior - heavy armor, light armors *need high defense to protect others
rogue - light armor *rogue, surprise enemys from the dark shadows
wizard - robes *caster need to be agile, i see so many wizards on light armor that got mana problems
warlock - robes *same like wizard
cleric - ligh armor, robes *healer, choose his support style by armors
bard - robes *supporter and motivator, robes for mana machine
and for real, if a wizard or warlock is standing pvp 1on1 - something gone wrong in my eyes xD