Okay, so I thought I had a good thing going here, but then someone had to point out that the Crown/Bank thing doesn't work with any drawing cards I only got to 673230, so liopoil is way ahead.
Per that, I am going to post the thing I was using that I don't see here yet.
You should be able to add Highway to make Cache free since it shouldn't be able to increase hand size. This gives you 3 gains for each Cache buy, which costs $2 via Travelling Fair. With Banquet, you only gain 5 cards for $5 (Banquet + $2 for the buy). Of course, Talisman doesn't work with Banquet, so maybe liopoil is already on this track or something better.
I am currently using highway with death cart/travelling fair for three gains per 2 coins, but that is not the main part of the solution.
Cool, hadn't thought of Death Cart and another option
Is Crossroads+Haunted Woods more valuable than bringing King's Court into the mix? KC should be fine as long as you have no draw cards (other than Tactician).
I can get to 548 cards in hand with Crossroads/Haunted Woods, and that was without the 2nd player's Necropolis, so I think I would get to like 1088(more than this because of an extra Haunted Woods on the setup turn...) so probably King's Court is out.
Hmm is it possible to use necropolis on the setup turn? I guess it is as long as you scheme the necropolis.
I don't see why not. Your setup turn is the last cards before you shuffle, then you shuffle and have everything you need in whatever order on the payload turn.
I think the largest finite amount of action you can get (provided there is draw) is 6: Tactician, Crossroads, 2 Necropolis
This is what I have too, and with two necros on the setup turn the maximum hand size before playing any cards is 29, yes?
Oh, the opponent should probably play Swamp Hags on his turn, not Council Rooms. He can play 4 Swamp Hags, if we want the acting player to have 6 actions, so that would add 4 gains for every buy.
Actually believe it or not I believe the starting hand size is more important
Are you sure? 4 extra gains more than doubles your total. I guess payload does not grow linearly with handsize, so I could see that being true.
29 sounds correct to me. 5 Haunted Woods + Tactician + 4 Opponent Council Rooms.
I come up with a max handsize of 1728, but there may be restrictions from the payload that make that setup non-viable.
Edit: Save I guess... adds one to the start so a bit bigger.