Additionally, using grand soul gems (filled with grand souls, of course), you can enchant 4 items (head, chest, ring, & amulet) with "Destruction cost 25% less," thus making destruction spells free. The beauty is that this applies to enchanted weapons. A sword with Fire/Frost damage or absorb Health/Stamina will not lose its charge if used while wearing the above enchanted armor.
Enchantments such as these, applied to some legendary dragonscale (or plate, in your case) and some nice weapons, ensure a good time plowing through anyone that dares enter your sight.
Happy enchanting/slaughtering