Going full frost while leveling?

Hey, I'm lvl 40 now as my mage and I'm thinking of putting every talent point in the frost tree to maximize my output damage to level 60.
Is this something I should ABSOLUTELY not do, or this is actually viable?
Been thinking about it now as I just got to 40.
Is this something I should ABSOLUTELY not do, or this is actually viable?
Been thinking about it now as I just got to 40.