It screams DPS. However, BLU could take any given roles. Whether healing, pseudo-tanking, and damage dealing. I think it will be a DPS caster. If that's it, it could still learn abilities. However following the rules from FFXI, you can equip a limited number of spells/attacks at a time. I thought if that were to happen, certain spells/attacks could make it a tank, healer, or DPS when equipped. So it could literally be anything based on what it has equipped. Then again, people will be saying they only want certain sets for endgame...and that's a whole can of worms.