TANANAC Is the acronym by the way. The Arcane Not-Archer Not-Cleric. Just getting that out there first.

DISCLAIMER: This build is far from optimized, and I have not capped it, however this is by far the most fun I've ever had on a character, and if you're into the journey to 20 rather than just being 20, this build is worth a try. I do not run the math, nor do I spec in equipment because I still consider myself inexperienced at this game.
Also I have warforged, and I have sorcerer. I know if I wanted self-healing and SLAs I could easily just do that. I like halflings. Get over it.

Halfling 20 Wizard

1 Least dragonmark of healing
1 Maximise
3 Empower
5 Mental Toughness
6 Spell Focus: Evocation
9 Lesser Dragonmark of Healing
10 Heighten
12 Greater Spell Focus: Evocation
15 Greater Dragonmark of Healing
15 Spell focus: Enchantment
18 Greater Spell Focus: Enchantment
20 Spell Focus: Conjuration
Enhancement: Wizard Master of Magic
Enhancement: Extra Dragonmark Use I
Enhancement: Extra Dragonmark Use II
Enhancement: Extra Dragonmark Use III
Enhancement: Extra Dragonmark Use IV
Enhancement: Improved Concentration I
Enhancement: Improved Concentration II
Enhancement: Improved Concentration III
Enhancement: Glacial Spellcasting I
Enhancement: Kinetic Spellcasting I
Enhancement: Kinetic Spellcasting II
Enhancement: Kinetic Spellcasting III
Enhancement: Kinetic Spellcasting IV
Enhancement: Deadly Kinetics I
Enhancement: Deadly Kinetics II
Enhancement: Deadly Kinetics III
Enhancement: Deadly Kinetics IV
Enhancement: Deadly Kinetics V
Enhancement: Deadly Kinetics VI
Enhancement: Frost Manipulation I
Enhancement: Frost Manipulation II
Enhancement: Frost Manipulation III
Enhancement: Frost Manipulation IV
Enhancement: Frost Manipulation V
Enhancement: Frost Manipulation VI
Enhancement: Frost Manipulation VII
Enhancement: Force Manipulation I
Enhancement: Force Manipulation II
Enhancement: Force Manipulation III
Enhancement: Force Manipulation IV
Enhancement: Force Manipulation V
Enhancement: Force Manipulation VI
Enhancement: Force Manipulation VII
Enhancement: Wizard Spell Penetration I
Enhancement: Wizard Spell Penetration II
Enhancement: Wizard Spell Penetration III
Enhancement: Wizard Energy of the Scholar I
Enhancement: Wizard Energy of the Scholar II
Enhancement: Wizard Energy of the Scholar III
Enhancement: Wizard Intelligence I
Enhancement: Wizard Intelligence II
Enhancement: Wizard Wand and Scroll Mastery I
Enhancement: Arcane Bolt
Enhancement: Wizard Archmage I
Enhancement: Wizard Archmage II
Enhancement: Wizard Archmage III
Enhancement: Archmage Secondary Spell Mastery I: Conjuration
Enhancement: Archmage Spell Mastery I: Evocation
Enhancement: Archmage Spell Mastery II: Evocation
Enhancement: Conjuration I - Grease
Enhancement: Conjuration II - Web
Enhancement: Evocation I - Magic Missile
Enhancement: Evocation II - Gust of Wind
Enhancement: Evocation III - Chain Missiles
Enhancements were shown to represent leveling options, not exactly what they should be at endgame. Again this is the journey build.

As I said, it is not optimal, but man those SLAs are fun as hell. Would work even better with Arcane Initiate, just another one to add to the combo.

What are we missing?
Spell Penetration, Greater Spell Penetration (Which is why I take it in enhancements), Quicken, Toughness, Insightful Reflexes
Endgame Content won't be as good obviously.
Specialization in more than one "real" element. Force spells are fun, but there's 3 of them. You will be maximizing and empowering two of them for free.

What do we gain?
Absolutely huge healing ability. Playing this build into mid level and I usually did not use all my dragonmarks, and soloing was the same story. You can heal yourself and others incredibly well. There were times I actually just was the group healer and guess what? It worked.
The heals are uninterruptable, are not based on your Concentration, and all but the greater (which is like, heal, anyway) are affected by Maximize/Empower. 10 HP to Full in the equivalent of a quickened heal? Yes please. Having tons of those? Yes please.
Moderate Damage SLAs. I built this originally because I wanted a more exciting healing arcane archer. Hey it worked.
Still able to get SF Enchant and GSF Enchant. So that's good.

Again, this build is not optimized, nor is it supposed to be. It's a "concept" build. Telling me it sucks because it's not the best thing ever or what everyone is doing will do no good. However, coming up with ideas to expand on the concept and make it better is an excellent idea. You should do that instead.