I'd pick mage with standard Fireblast heroic to clear the 1/1s. Other than that, the passive treasure that gives your minions rush is a solid pick for the 3rd part of Dalaran Heist. You need pure tempo vs both bosses, cant imagine you can win a value game vs either on heroic.
Both Jepetto and Hannigan can be done with Shaman with evolve hero power and rush treasure. Be lucky like me and also pick stargazing for double use 1 mana hero power. Play a guy, rush an enemy minion down, evolve, rush again, evolve again, rush again. One of your minions can clear up to 3 of his guys in a single tur