Originally I was considering Evocation because really who does not like to blow things up.
Evocation is a weak choice. Direct damage magic is underpowered relative to physical attacks, your party fighter will always outdamage your spells, and is far less effective than Save or Suck style spells - it is much better to take multiple targets out of a fight without killing them than it is to deal a small amount of damage. I would suggest Conjuration, Necromancy or Divination.
I did read another thread that mentions Conjuration as being quite fun and powerful as well.
Conjuration would be my first choice.
So - whats the game plan to make me uber-wiz.
Max INT? What secondary stat? Dex for AC or Con for HP?
Max your Int; get it as high as you can. Your casting ability modifier affects saving throws and you really want those to be as high as possible. As for Dex vs Con both are valid choices, however, since you will probably play an Elf you will be virtually railroaded into going the higher Dex route.
If I play an elf I can wield a sword and bow - should I be swinging/shooting stuff? Maybe with that high dex...
Pick up a bow and stay out of melee unless you went with a Necromancer or a Transmuter. If you go with a Conjurer and you maxed out your Int you will get enough uses of Acid Dart to get you through most days and if you run out of those your Level 0 ranged touch attacks will still probably be more reliable as they ignore armor.
Any familiar worth taking or are the bonded items the obvious way to go?
Bonded item. All the way. The ability to toss out any spell you could normally cast once per day is just too good to pass up.