Ok. So there are some piles the board needs. Haggler, Black Market (Has Young Witch in it, also has a looter), Watchtower, Nomad Camp. Most likely Procession, perhaps Kings Court. There has to be a gainer of some kind, Ironworks or Armory work best, Armory is moot because of Watchtower. Bridge is key, so add that. Catacombs has proven vital in past CC solutions. The hard mode includes a 900 point cap, so Goons as well.
So, so far we have Haggler, Black Market, Watchtower, Nomad Camp, Procession, Ironworks, Catacombs, Bridge, Goons.
That leaves 2 kingdom piles. Lacking above we have KC, some sort of + action(except IW), and that last brilliant card that pulls the solution together.
CC, when are you posting a solution? I can't wait to see what you've come up with