well i like to have all gear planned out before i build a char. But if its a first char and you really dont have much my best advice would be to use gear as needed as you level up
chances are that once you get some decent gear your going to want to delete your sorc anyways or replace it with a new char

but id say enough dex for max block...enough strength to wear decent gear and res into Vita

Es isnt really for the poor