lurker can get you another 15 in 6 player games, rather than just 9 from 4 player games.

Additionally, black market can add some. There are 53 2-cost cards, but 6 are events or heirlooms, so 47. With the 1 imp gainer, you have 39 2-cost cards eligible for BM, making black market an increase of 29 cards or 58vp.

Masquerade is another way to get the estates from another player, and get the 3 heirlooms. loosing the 9 from lurker (one into the BM deck), that gives an additional 6 cards or 12 vp. Of course, linked cards in the BM deck.

Why are pixie and tracker 11 in the math? Assuming that’s right, 164 cards and 328vp.