If I were building a human War/Duskblade, it'd look like this:
Human Warblade 1/Duskblade 13/Warblade +3/War Mind 2/Warblade +1
1: Wild Talent, Psionic Weapon
3: Searing Spell
6: Vital Recovery
9: Arcane Strike
12: Explosive Spell
15: Psychic Renewal
18: Piercing Cold
Bonus Feats: Combat Reflexes, Combat Casting
Maneuvers (in no particular order):
Moment of Perfect Mind, Iron Heart Surge, Stone Bones, Crushing Vise, Douse The Flames, White Raven Tactics; Punishing Stance, Dancing Blade Form
Armor Class is nice, and all, but ultimately putting as much energy into simply not getting hit has a negative impact on your offensive output. The idea behind the build I show here is that you're able to reach opponents and do enough damage to contribute to - rather than simply survive - the battles, while not relying on your Cleric or Druid. If defense is still that important, you've got gold and spells to boost it without using precious Feats.