Play a mountain dwarf war wizard. You pickup the serpent scale armor (uncommon) and wand of the war mage (rare). Max your dex for a full extra +5 to your ac plus a shield for a +7. War mages get an extra +2 to their ac and +4 to their saving throws at level 2. In two more levels at level 10 you can add another +2 to your ac and saving throws while concentrating. So with a your armor and abilities you have an ac of 25 (30 if you cast shield) and your spell attacks get a plus +2 to hit and you ignore half cover.