My advice is don't optimize too much, because you will reduce the game to "super wiz and his monkeys with sticks"

have your blast and utility too!

make a party friendly item creation/know-it-all wizard with staff like wand.

you will never run out of blasty spells, and the melee will love you for doubling their gold.

Human
Wizard lvl 12 [Diviner(Foresight)]

Int: 24/26 (depending on +4 or +6 item)

Traits:
Reactionary (+2 initiative)
Hedge Wizard (-5% item crafting cost)
(human alt racial) Focused Study (bonus skill focus 1/8/16)

Feats:
1 Scribe Scroll
1 Improved Initiative
1B Skill Focus (Spell Craft)
3 Craft Wonderous Item
5 Craft Arms and Armor
5B Arcane Discovery (Arcane Builder: Wonderous Item)
8B Skill Focus (Knowledge Arcana)
7 Forge Ring
9 Craft Rod
10B Arcane Discovery (Arcane Builder: Arms and Armor)
11 Staff Like Wand

Skills:
Spell Craft
Linguistics
Knowledge (Arcana)
Knowledge (Planes)
Knowledge (Dungeoneering)
Knowledge (Religion)
Knowledge (Nature)
Knowledge (Local) (human bonus)
Knowledge (History) (+2 headband bonus)
Knowledge (Engineering) (+4 headband bonus)
Knowledge (Geography) (+6 headband bonus)

Familiar:
scorpion with "valet" archetype (does all the fine detail work for you)

you will be able to hastily craft just about any item you can think of, while adventuring, in nearly no time.

Items:
assorted meta magic rods: piercing spell, quicken spell, extend spell, etc..
assorted pearls of power
headband INT +4-6
belt CON+DEX +4-6
bracers of armor enchanted with breath of life
mithril light shield enchanted with breath of life
cloak of resistance
assorted cheap wands for blasting all day


keep up greater false life and "get away" ... gain initiative (shouldn't be hard) and cast quickened buff spells for the melee like (communal resist energy, haste, communal stone skin, etc..) then blast with your wand or cast a 2nd buff or control spell. You can also simply double blast a bunch, depending on how many quicken rods you can afford.