This is an Argenport Midrange deck I've been messing around with since the release of Into Shadow and subsequent patch. It's still very much a work in progress, but I think the underlying idea is really powerful in the current metagame. The powerful Justice 3-drops seem really good right now with Hailstorm weakened by the recent balance changes. Vara also combines well with the 10 removal (Slay/Annihilate/Vanquisher's Blade), and Turn 4 Auric Interrogator into Turn 5 Vanquisher's Blade feels really really good. The cards I'm not at all sure about are:
2 Thief's Pick
2 Fenris Nightshade
2 Inquisitor's Blade
2 Telut, Queen's Hand
I've been testing out Sheriff Marley/Vara decks, which sounds counter-intuitive, but actually works quite well in practice, so I'd consider moving some of the top end down to Marley's. The reason you can support those two four drops together is because in the matchups where you really want Marley's Aegis (Harsh Rule decks, essentially), Vara demands an answer when played, so you're unlikely to have the two on the board together. The decks that can consistently sacrifice a unit to keep Vara from becoming a must-answer threat generally aren't trying to Harsh Rule you anyway. The Fenris Nightshade is also incredibly awkward, but my current solution for a card that pressures control but can block Teacher. It doesn't feel great, but interacting with both ends of the format has been pretty nice, and I'm somewhat considering going up to a third.
One last issue I'm very divided on: should there be a market? It would probably be a Shadow Market with something like Dark Return/Gift/Tavrod/kill spell/Devastating Setback. Those all sound fine, the problem is that so much of the value of the deck comes from its 12 3-drops, and one of them would have to be cut for the Merchant. The Auric Interrogator is the easy cut, but by doing that you lose a lot of synergy with weapons, Dark Return, and Tavrod. Dark Return on Auric Interrogator is the best Harsh Rule recovery available to the deck. I've found for now that the versatility you pick up from the market isn't worth the loss of power, but this could 100% be wrong.