A +1 Twilight Mithril Chain Shirt costs 1100 (shirt) + 4000 (enchants) or 5100. It has no armor check penalty or spell failure chance.
For a shield, nab a Darkwood Feycraft (
Dungeon Master's Guide II 275) Buckler. No ACP or ASF and cheaper than Mithril.
Doubly Flawed Simple Water Half-OrcNG or CG Dragonborn Water Half-Orc (
Unearthed Arcana) Barbarian1/Martial Transmuter5/Ruathar3/Abjurant Champion5/Eldritch Knight6
1: {Aggressive OR Spellgifted: Transmutation}, Battle Jump, Leap of the Heavens, [literacy], [Pounce], Practiced Caster: Wizard, {Quick}
2: [Improved Initiative], [Sudden Shift OR Hummingbird Familiar]
3: Travel Devotion
6: Cleave, [Power Attack]
9: Arcane Strike OR Combat Casting**
12: Arcane Strike OR Improved Bull Rush
15: Improved Bull Rush OR Combat Brute
18: Combat Brute OR -=FEAT=-
**If you can, get an unslotted item that continually grants the Combat Casting feat. Similar to the ioun stone that grants Alertness, this unslotted item should cost 6-15K.
Battle Jump, of massive and near vital importance to your build, is a [Fighter] feat from
Unapproachable East, a Faerun book, and only available at level 1. See
Little Red Raiding Hood for more info.