Mine would be a dark warrior archetype called verzta. The deck would be a toolbox for main focus and would have a lot of s/t and extra deck support. They would be focused on banishing eachother from the deck during main phase one and adding themselves to the hand with their own effects from the banish pile during main phase two.
This would hopefully give them OTK potlential and mirror force wouldn't hurt too bad considering you are adding about 3-4 CARDS of choice to your hand basically from your deck in main phase two. Also, it would be immune to Rai-Oh.
[19:36:10] Evil : I'm smexy and I know it
[19:37:02] Eren : you still think that evil
[19:37:06] -Kira- : ur sexy and we know it~
[19:47:26] Katarina : Evil
[19:47:28] Katarina : You're a god