I have a friend who did the same thing with Lukka as his Oathbreaker, and Transmogrify as his Signature Spell.
Can Lukka even be your commander? I thought Planeswalkers could only be commanders if they had the "This Planeswalker can be your commander" thing at the bottom of it.
Anywho, try Thud and Fling, so you can hit them with combat damage and then again with instant damage, usually winning in one turn instead of two. Satyr's Cunning is a horrible card in pretty much every deck except this one, here it's good because of the escape. Mimic Vat would be just rude in this deck. Avatar of Slaughter gives double strike, and forcing your opponent's Dark Confidantand Drannith Magistrateto swing doesn't seem so bad. Emblem of the Warmind and Fervor for haste. Transmogrify to get out two creatures per turn. Hammer of Purphoros for the haste, and Golem tokens to -2 on if you're desperate
You seem to be a better deck maker than me and probably already considered then rejected this, but Chaos Warp gets rid of enchantments. Alternatively you can manipulate your library, bounce your commander (so your library doesn't get shuffled), and drop a big boy.
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