Looks very similar to my Half Guardinal build. I more or less to the same feats apart from the saves.
As for AC, mine is only 106 at the moment although am only using UR robes. Saves are also a lot lower with mine all between 55 and 58! Evasion helps with defence a little.
I do have STR at 52, 4 points higher for a little more AB and damage - I must have put fewer points into DEX than you as I levelled. That would bring my AC to 108, same as yours and up my lowest save to 57.
I also used an INT arti, useful against confusion but more because I can now use those lvl 9 slots on the wiz belt I use - lvl 8 extended spells rather than true level 9s. This gives me a few more sets of full buffs in case of death.
Overall, I built mine for maximum offence. I have another for defence based around a staff and shield wielding Jugger. Sturdy Staffmaster is the basis, from Bort I think? Think I prefer this one, defence looks weak but 90% conceal (85% with breach boots) means you are tougher to kill than it looks. As you say, a fun build to play.
PS What did you specialise in? Do illusion or div get anything above LSF to add to EV or Prem?