Mostly up to you. Some people go all intelligence; some go 5 vitality, rest intelligence; some go 10 vitality, rest intelligence. Those are really the only three builds anyone uses.
When I started LS, I did 10 vita because I didn't have very good gear, so having more life helped me a little. Now I'm doing all int, because I have better gear. But tbh, it probably doesn't make much difference either way.