I've been doing 200~210 damage Icebolt with ~600 int, S5 Trinity Staff charged up to Ice level 3 thingy, Ice Master title. Total level 18xx.
And I could do more damage with 980 int (49 magic damage) and certain enchants.
Just sayin'.
By the way, Hailstorm is a great skill, in my opinion. Should rank Ice Mastery before that (mana reduction), then rank Hail.
On the fourth page, the Lizard Deadly staff should be S5, not S6 or R6 (don't take the risk of losing your 25 crit. Additionaly, Hailstorm does not ignore Protection for crit calculation stuff. S upgrade is better, in my opinion.)
Also, Magic/Ice/Lightning/Fire Master titles are better than the other titles. Give damage boost.
On the third page, Head enchants. Why is Round Treasure better than Vine Treasure? It says that Vine Treasure is 3 MA/14 crit while the one down there cuts 2 crit. That should be changed.
Like Axareel said, mages should get Mana Reduce set with the stuff he said. Broad Feather Hat, Magic School Uni, Magic School Shoes, Bone Marine Gaunts.