Jester and Ambassador can both go crazy passing potions to 3 other players.
Similarly, if an opponent goes Kc/Sab and you have Vineyards and some nice 2 coin actions, you want as many potions as possible - Sab will turn them into actions and you want a steady supply so you can buy vineyards whenever the opponent misses his Sab.
Other possible shots:
Workshop/Forge/Watchtower/Hamlet - you have no other 4 cost cards and for some reason the most efficient setup is to gain 2 pots and forge them every turn.
Upgrade/Develop/Remake with no other 4 cost card out. Something like Workshop/Upgrade/Watchtower/Grand Market/Border village could make for a strong setup for Workshop (gain Pot) -> Upgrade (Pot to 5, reveal Wt) -> Upgrade (5 to Gm or Bv). Again, rare, but possibly the best move.