faust, in neither of those solutions do you have 0 VP during your Buy phase, fun though they are. However, the second was the inspiration for the following:
Kingdom: King's Court, Armory, Workshop, Engineer, Ironworks, Rats, Trader, Beggar, Peasant, Scrying Pool.
Opponent has their Shelters, a single Soldier (to enable buying Gold), some Gold, some Platinum, 4 Colonies, 3 Provinces, 1 Duchy and a Curse, for 60 VP.
Your deck at start of turn: 10x KC, 5x Disciple, 5x Beggar, 2x Trader, 3x Colony, 1x OE, 1x Necro, 1x Potion, 1x Scrying Pool, 4x Ironworks, 4x Armory, 4x Workshop, 9x Engineer. The only cards in the trash are your Coppers and Hovel.
(To get to this state, start off getting a SP and a Soldier; a hand of SP (drawing Soldier + Copper), plus 4 Coppers, lets you buy KC, and from there it's clearly possible; Trader lets you thin Coppers safely).
Starting hand KC-KC-SP-Colony-Colony. KC-KC-SP draws everything provided one of the stop cards is at the bottom of the deck.
Currently have 2x KC plays; KCing a KC gives 2 more KC plays, so we have 18 KC plays left.
6 of these target Engineers, gaining 4 cards per Engineer, so 24 <4 cost gains, which we'll discuss later
5 target Beggars, gaining 45 Coppers
2 target Traders, trashing 3x Colony, 2x Shelters and 1x Potion, gaining 39 Silvers
5 target Disciples, giving 15 Disciple plays
- 4 target Ironworks, gaining 4 Ironworks and 8 <4 cost gains
- 4 target Armories, gaining 4 Armories and 8 <4 cost gains
- 4 target Workshops, gaining 4 Workshops and 8 <4 cost gains
- 3 target Engineers, gaining 1 Engineer and 9 <4 cost gains
We have a total of 57 <4 cost gains. Gain the following:
7 Estates
7 Curses
19 Rats
14 Potions
9 Peasants
1 Trader
We have 0 VP and 1 Buy. Kings' Courts and Engineers are empty; there is 1 Estate left. We've gained 45 Coppers, 39 Silvers, 13 cards from Disciples, and 57 <4 cost cards, for a total of 154 gains. Buy Triumph for 156 VP.
We even have a spare Landmark slot (using the semiofficial limit of 2 events/landmarks)... Aqueduct we can get up to 8 if we do the Silvers after the Estates, which I think is the best. Maybe more, I think up to 14, if replace the Workshops by Minting Golds?