Identify is not the most important divination spell. What about True Sight? And Wizard's Eye? I can play without the second, but, especially if you are soloing, True Sight will become mandatory. Regarding all those, I choose sorcerer, or, if only mages count, generalist mage. My first solo was the generalist
And where do you get the glasses of Identification in the Slums? I remember buying them from a merchant, but it was in the Promenade, IMO.