Playing around with Dark Ages cards, I just had those in a solitaire game. Kind of ridiculous.
Well you could sort of supplement the blackmarket/dual tactician engine through heavy Havens (or to an extent Wharfs), but those are not nearly as fun and ridiculous as this.
edit:
As some people seem to not understand how this works and the playing area is not complete because I was lazy and don't wanted to increase the picture size above the absolutely neccessary:
Buy a black market, 2 Tacticians and a bunch of Hermits (or just one).
start: Play tactician, discard your hand. Next turn: Play Necropolis, play Black Market, play Royal seal, play Hermit, play Tactician, don't buy anything and topdeck the Madman you get from trashing the Hermit with Royal seal.
Next turn: Draw 5 extra cards from Tactician, play the Madman and draw 9 cards, play Black Market, play all your Money (and leave one card in your hand, play Tactician and buy something neat with your potentially 15 Treasure cards. If you had a bad draw play a Hermit, buy nothing and topdeck the Madman with Royal seal.
Repeat as you want, or alter it by topdecking hermits or some +Action if the Necropolis is in your discard or if you expect a bad draw in your next Tactician turn.
Basically this enables you with relative consistence to make a bunch of 18 card turns in your game with Hermit, Royal Seal, Black Market and Tactician without any other engine components. I thought it is quite neat.