Celtic Heroes

Ok so this is a mage question.. let's say I want to be a fire mage... what skills do they use? And as an ice mage currently i can't see myself being without ice shield xD

Ty for all your advice... may I ask what advantage fire mages have over ice mages for dps? And for Rogue is dex build the best way to go?

Who gives higher dps Mage of Rogue?... I have a 89 Rogue and with sneaky attack and assassinate along with SS and quick attqck his dmg output is insane and I have a lvl 75 mage and he seems like he couldn't compare to my Rogue even if they were the same level... like would ice shards get anywhere cl...