Scheme!!
Throne Room, Village, Walled Village, Fortress, Quarry, Rats, University, Band of Misfits, Border Village, Scheme.
BAM. There shouldn't any real decisions at all to make here. No possible combination of cards could improve your hand at any time beyond 5 cards, and those 5 cards can't ever be more helpful than pure treasure. Towards the end of the game you could buy a Border Village for $6 instead of a Duchy for $6, just for the fun of it.