Is it viable to build Zak as a mage and solo the single player game?

[IanTheWizard]

Hi all. I completed the single player game by building Zak as the default melee build a few years ago. Recently, I'm considering building Zak as a mage and solo replaying the single player game. But Zak's relatively low Intelligence is concerning me.

Zak's Intelligence is only 25 at the beginning, and it can increase to only 28 (I don't remember any item which can further increase Intelligence). In comparison, when I was creating my multiplayer mage, I maximized his Intelligence to 35 and increased it to 38 later in the game. That is, Zak has 10 less Intelligence than the best mage build.

Has anyone tried building Zak as a mage and soloed the single player game? Does his relatively low Intelligence make the solo gameplay unenjoyable?