Currently 34-1 with this deck in gauntlet. Average turn time is around 9-10, so not the fastest deck but very consistent against everything I have faced. Only loss was against charge boss that won with top deck double damage 3/3 dude and did 14 damage in one turn otherwise would've stabilized.
Basically this deck revolves around tons of lifesteal to stabilize the early game and then use merchants to get deepforge plate to 2 turn kill with double damage merchant or gain life to draw your vara's, xo's, etc to outvalue your opponent.
At the moment the card that is most dispensable in the main deck is valkyrie commando as silence isn't that useful in many games. Not exactly sure what to slot in there other than more lifesteal like hojan, extract, whirling duo or stonepowder alchemist. In the market, harsh rule and rizahn aren't the best and could honestly be replaced with a fire/shadow or fire/justice seat, but i have never been power screwed to the point of losing.
Vicious highwayman is great against token decks and other decks that flood with 1 health minions. Basically another vara (lifesteal + kill a small minion) in many cases.
I have not faced the double damage boss but I would assume it wouldn't fair too well unless great draw.
Thanks!