As others have already said it is the easiest and makes the most sense to just take thaumaturgy, specialize in crafting and take refinement as many times as you can for 4 enchanted item slots each time. Beyond that it's entirely up to you how you want to stat the armor. From the second movie I'd use something like:
(assuming 3 refinements and superb lore)
Enchanted Iron Man Set (16)- Base power, lore + 1=6
(3)Wrist Guards (plasma cannon) (weapon 6, uses: 5)
(3)Gloves (Laser Beams) (weapon 9, uses:1)
(6)Chest (armor) (Block 10 or armor 5, uses: 5)
(2)Boots (flying) (Wings, Effortless Movement, uses:9)
(2)Potion Slots
Items:
Iron Man Suit- Armor 2
Mini Gun- Weapon 2
Mini Rocket (3) - Weapon 4