Personally would imagine a damage dealer that gets by weaving en-spell attacks (imbues their weapons in elemental strikes, and other self enhancing skills) that culminate in some unique enfeebles, picturing a sort of magic monk.

So a sort of selfish Green mage? They'll have buffs and enfeebles to be team supportive but due to the trinity (damage, tank, healer) they'll be a bit more selfish than a stereotypical green mage might be.