I would drop Archmage entirely myself, if your going Sorcerer then I suggest looking into Battle Sorcerer Variant (DMG) or Stalwart Sorcerer (Complete mage).
Also I might add with Wish, its better to get shapechange (if they didnt nix the spell too much), you can change into an Effreeti and give yourself Wish all you want without the 5k Diamond Dust or whatever the price is.
I suggest also looking into Book of Exalted deeds and look at Exalted Arcanist. It might prove to be something good?, Its a 4/5 spell casting but its easily fixed if you go Kobold and take the ever so awesome stuff you can do with it. Draconic Resivoir and the other goodness stuff.
The Abj Champ I would nix that myself, if your going into a Arcane Gish type build I could understand it but Abj Champ isnt all that great. Your best bet is to go for things the sorcerer is good at. Get a high arse Dex and Int and your set.
Or look into the Warmage Base class out of Complete Arcane, get some of the goody stuff spells it grants and get Int Mod to Damage. Problem is the Warmage has no versatility. Things to think about.
Retraining, as I said, isn't an option.
I would think that noble Djinn's
Wish is Sp not Su, honestly. Besides, considering the rest of the party, it's overkill. I want to cover all my bases, not make anyone less relevant. Kobold-dragon cheese would likewise be overkill, even if this DM did use the web supplement for RoDr, which he doesn't.
BoED is not one of the few allowed books in this campaign, and even if it were 4/5 spellcasting, and a high feat tax would kill any appeal this class had, even if my character was that sparkly good. Most (but not all) of the exalted spells are crap that's hardly worth casting anyway.
I think you missed the boat on Abjurant Champion though. Combat Casting is a crappy little feat, but free Extend on a whole school of magic is pretty good. Abjurant Armor is nice enough. And free Quickens? As a sorcerer?? Seriously, this is worth the moderately crappy prereq feat. Having a good swift action every round is vital to mastering the action economy. Arcane Spellsurge does it better, sure, but it wasn't allowed here. With 5/5 casting, and nice perks, it's not just a gish class, even though it sports a d10.
I get the high DEX (AC, and REF saves, as well as ranged touch attacks), but other than skill points, I'm not sure why you think a high INT is vital to a sorcerer...?
Warmage, Battle Sorcerer (UA), and Stalwart Sorcerer all give up flexibility of spellcasting for hp, AC, etc. Losing flexibility or options is the last thing I need... but again, no retraining, so it's moot. INT mod to damage (even if it was a +10) is really not worth anything at 17th level, btw.