So Fopo as discovered that I might know what I am talking about when it comes to Wizards. And He as asked me for the blueprint for how I would make a Elf Wiz. This is what I think is the best way for now.

2 Rogue 18 Wizard

Abilities Base Stats
(34 Point) (Level 1)
Strength 14
Dexterity 8
Constitution 14
Intelligence 18 (all level ups, tomes eaten at 3 and 7 for sure! You want those skills)
Wisdom 13
Charisma 9

Tomes Used
+1 Tome of Intelligence used at level 3
+1 Tome of Charisma used at level 3

Skills
The idea is to max Search and Disable each level and Intimadate, Concentration when able. We can play catch up on UMD when we take that next Rog level which is at level 9. Let Concentration slip to keep imporant skill maxed, well will be able to add points to it again at level 16.

Level 1 (Rogue)
(Half-Elf Dilettante) Half-Elf Dilettante: Cleric / swap to Monk when Umd is high enough and enjoy a fair amount of healing amp.
(Past Life) Past Life: Wizard
(Selected) Power Attack
Level 2 (Wizard)
(Wizard Bonus) Extend Spell
Level 3 (Wizard)
(Selected) Toughness
Level 4 (Wizard)
Level 5 (Wizard)
Level 6 (Wizard)
(Selected) Maximize Spell
(Wizard Bonus) Spell Focus: Necromancy
Level 7 (Wizard) Pale master 1
I layed out Enchments at 7 so you can see how I get started.
Rogue Haste Boost I
Human Improved Recovery I
Human Versatility I
Human Versatility II
Racial Toughness I
Racial Toughness II
Rogue Sneak Attack Training I
Improved Disable Device I
Improved Intimidate I
Improved Search I
Wizard Lineage of Elements I
Wizard Elemental Manipulation I
Wizard Elemental Manipulation II
Wizard Energy of the Scholar I
Wizard Intelligence I
Wizard Wand and Scroll Mastery I
Wizard Wand Heightening I
Wizard Pale Master I

Level 8 (Wizard)
Level 9 (Rogue)
(Selected) Insightful Reflexes
Level 10 (Wizard)
Level 11 (Wizard)
Level 12 (Wizard)
(Wizard Bonus) Heighten Spell (?)
(Selected) Greater Spell Focus: Necromancy
Level 13 (Wizard)
Level 14 (Wizard) Pale master 2, to be clear here I like Lich
Level 15 (Wizard)
(Selected) Quicken Spell (?)
Level 16 (Wizard)
Level 17 (Wizard)
(Wizard Bonus) Empower Spell (?)
Level 18 (Wizard)
(Selected) Past Life: Arcane Initiate (?)
Level 19 (Wizard)
Level 20 (Wizard) Pale master 3