I don't know why I can't do parapraphs. I tried hitting return twice but it doesn't work.
Adding some suggestions on role: DPS (constant dps, not burst), Nuker (burst, not constant), Tank (high health, defense, damage reduction etc maybe healing counts as well?), debuffer, escape/mobility (how good the class is at escaping, kiting, mobility), CC (crowd control), aoe (how powerful and how many skills that are AoE).
Please add more roles if you can think of any.
It's best to also have strengths in them so maybe a ranger and wizard has 1/5 tank role, a rogue has maybe 2/5 tank, a priest maybe 3/5, a warrior maybe 4/5 and a paladin maybe 5/5. Just an example.