Mulligans
General Mulligans
Only keep power word shield if you have a wild pyromancer.
Keep Auchenai + circel if you have them both, else mulligan them away.
if your hand is okayish, you can keep shadow madness.
Focus the entire game on clearing the board as efficient as possible.
Most creatures you will face have 2-3 attack. Shadow Madness is great to steal them and push them into romulo.
Mid game Resurrect and Onyx Bishop can summon Wild Pyromancer, which will give great clear potential. If Barnes summoned a Baron Geddon or Ragnaros the Firelord it can almost guaranty domination if sommoned early with resurrect.
Getting Baron Geddon and Ragnaros the Firelord on the field will ensure victory. having one of these should be enough to stop your opponents tempo. Jullianne doesn’t have any removal spells, as long as you keep dealing with the creatures efficiently you will win.