Mine approach was (6 spies - 1 extra for increasing probability) Cantarella, Roderick of Dun Tynne, 2x Emissary, 2x Duchess's Informant, (1 quest finisher) Yennefer of Vengerberg, (1 game "not loser") Cahir Dyffryn and (1 combo stabilizer) Royal Decree.
I added some more cards like Defender to...