T6: I prefer another Trading Post to Mystic. (again at T14)
T7: Getting three Coppers along with your Gold is just worse than buying Silver.
T24: Why Duchy instead of Province? There are three Provinces left, no?
Mainly that Cache-tastic T7, without that maybe you'd have only lost the Curse war 6-4. One Sea Hag to three Familiars, though, that's what's going to happen. By the end of the game you still have all 7 Curses left, so really Trading Posts would have been doing more for you than Mystics.