I played this game IRL recently:
Dungeon, Watchtower, Scavenger, Transmogrify, Archive, Artificer, Counting House, Relic, Soothsayer, Storyteller
2 players, Provinces/Estates.
We both opened 5-2, I got Artificer while my opponent got Soothsayer. I tried to build an engine with Archive for draw, Artificer for gains, and Transmogrify + Watchtower for some thinning.
My opponent picked up Transmogrify and Dungeon on their next shuffle, and then a Relic, more Dungeons by Transmogrifying Estates, and a second Transmogrify. After that, some more golds and then provinces.
They got in a few curses before I was able to get Transmogrifies, Dungeons, and my two Watchtowers. Transmogrify with Watchtower in hand let me thin my deck, and both that and Artificer + Watchtower let me run out the curses (e.g., Transmogrify Curse/Copper into Curse, trash with Watchtower). I tried to build up to large hand sizes with Archive to get extra gains with Artificer, playing Watchtower at the end of turns to refill my hand with treasure, which included a small number of Silvers and one Relic to attack my opponent (playing Watchtower after discarding most of my hand to Watchtower). However, in the early part of the game this draws cards dead with Watchtower a lot (later on, you're getting through the deck and so if you have the right number of Archives you can discard essentially all treasure cards to draw with Watchtower).
However, my opponent raced out to four Provinces and milled two more with Transmogrify, ending the game before my engine had spent many turns firing. I see a lot of different potential plans here. Can Dungeon and Artificer support Counting House? Can Golds from Soothsayer fuel Storyteller as draw? Thoughts appreciated.