This Idea Come from 'Lejes' of Kyber
Warforged Wizard
Str 8
Dex 13 +1 Tome +6 Item = 20
Con 18 +1 Tome +6 Item +1 Enhancment = 26
Int 18 +3 Enhancment +6 Item +3 Level Raise +2 Tome = 32
Wis 7 +1 Tome = 8
Cha 6
1st Mithril Body
1st Extend Spell
3rd Mental Toughness
5th Empower Spell
6th Imp Mental Toughness
9th Spell Pen
10th Heighten Spell
12th Greater Spell Pen
15th Spell Focus
15th Maximize Spell
18th Greater Spell Focus
20th Quicken Spell?
HP Break Down 14th Level
56 Class +20 Heroic +10 Favor +30 Greater False Life +112 Con
228 HP
AC Break Down 14th Level
10 Base +2 Chaos Guard +5 Protection +3 Barkskin +10 Armor +5 Dex +6 Shield +1 Haste +3 Chattering Ring
45 Ac +1 if you get a Twlight Mith Heavy Shield +2 if you get a Real Barks
So you now have a decent Ac so not everything hits you auto 42 is easy to get to and requres no raid loot your hp is a large 228 I know a lot of people who dont even have that as a tank/hybrd.
Best of all you can Heal yourself yes Heal yourself 1 Reconstruct Spell is more then enough to heal yourself also you have a 25 concentration without an item you might cast spells when geting hit.
You Could also drop a Feat maybe Improved Mental Toughness or Greater Spell Pen or Greater Spell Focus and take Combat Expertise this will let you drop a firewall click it and go into block mode for 7 more ac for a total posible or 52 and 55 if you get a real barkskin and find yourself a beter shield add 4 if a paladin is near for 59 ac standing in your own firewall leting mobs burn.