always mulligan for Nozdormu the Timeless or for Call to Adventure  to draw him and play him on turn 4. then your next best tools are Duel! and Prismatic Lens to cheat out big minions and to control the board the best big minions were chosen for this deck some can be changed if you don't have them but i prefer it with these minions in the deck list .

another great tool is Blatant Decoy  that will help you greatly unless you are playing against another big minions archtype deck