Well it's definately a different take, it might work well as a sub for demi-mage types like DRK and PLD if it's damage and acc are based off enfeebling/enhancing skill. If you based the accuracy and/or damage off the ranged calculations, it would probably suffer horribly due to RDM's low archery skill. However it would probably completely exclude other mage/demi-mage classes due to the lack of equippable bows, and other jobs due to lack of mp and enhancing/enfeebling skill.