This power build can easily surpass Swim's Dorf Hybrid relying on base strength and utilizes the seldom seen Nauzica Standard Bearer which gives a 2 buff on the row. Rather than running commanders horn to buff your side you want dimeritium bomb to erase your opponents side if you are matched against swim's dorf hybrid as he can out-buff but never out-base your capability. Stefan Skellen combined with your leader ability means you can reliably pull Dbomb and or Letho to completely flatten his chances. Letho consumes the mahakam defenders and dbomb removes the superior buffs that hawker healers put down.
The sheer high base strength of this build can also power through Radovid removal. I believe this is the most reliable and powerful deck against the 4 most common decks currently in play (radovid control, nilfgaard control, swims dorf hybrid, monster consume) as the raw strength here combined with locking cards / letho / dbomb can thwart and deny them all while putting staggered base power (5, 7, 8, 11) down in a single, manageable row, faster than any other faction can muster.
I developed and have been playing this deck for the last day and haven't come against anything like it in the past so rather than waiting for someone else to publish my deck I figured I ought to get this up. Here's looking forward to a more diverse meta. Enjoy!
You want to hold 1 witcher and as many first lights (for thinning or for clearing the row if matched against weather) and Nauzica Standard Bearer's as possible in your initial draw during mulligan as you want your first light's to draw your base value cards for you.
First card down should always be Regis when you draw him as that allows you the option to use epidemic on anything your opponent puts down if you so desire, otherwise just begin with witchers and then staggering different value cards on the table to prevent scorch from doing much damage if present. Play this basically like swim's dorf hybrid and use letho to banish whatever annoying cards your opponents deck has or as a last line of defense against the kambi apocolypse or villentretenmerth.
Assuming you were able to play him in round one, Regis higher vampire in round 2 allows you to either pass and force your opponent to lose card advantage or a gold card or springboard ahead to seal the win as you absolutely should have won round one unless your draw uncommonly didn't allow for it (biggest hit is missing a witcher draw in which case I'd pass early in round 1 and try again in round 2 since Nilfgaard's mulligan gives you the best odds of any faction to get witchers in round 2)
If your hand lacks Auckes and Cleaver then Epidemic ought to be reserved if your opponent plays rot tossers to prevent your row from being eaten from the bottom up.