Diplomacy

Ambassador can return Curses you're handed straight back to the Supply for someone else to draw.

Cheap alt-VP piles score best when you can gain/buy many cards per turn to pad the deck count — the generalized Beggar/Gardens pattern.

Watchtower and Trader defuse Witch-family attacks on gain — a strong pick-both signal when cursers are present.

Port/Magpie/Experiment empty their own piles fast, pairing with Gardens/Silk Road rush plans.