Wizard Build help

[rjedi]

This is a build i would like to Plan COMPLETELY out before i make it

I am wanting to try out wizarding and so i would like acess to level 3 spells asap and other spells as well
I have Drow but no 32 point build

Should i max intelingence then Con then Dex?
I was thinking of Heavy Crossbow or should i pick up reapeating heavy crossbow?

And what level 2 spells are a must concidering i dont have any scrolls yet or inscription materials? ( i know of plenty of higher level spells but level 2 always stumped me lol )

I know the action points can be reset but i like to keep mine in place so what should i take if i want to do damage but also stay in the back of the party being able to buff?

And Last what are some good feats? mental toughness? Spell focus? Weapon Proficiency (heavy repeating crossbow?