What did you expect?

Thin your deck with Tip the Scales, Crystology and Salhet's Pride.

You should be pretty aggressive, so idk, maybe playing only one copy of Baleful Banker + Holy Wrath could be enough, but I hate warriors.

You shouldn't be afraid to Baleful Banker an expensive murloc if you have floating mana in any other matchup in the game, it will happily come back with Tip the Scales.

Enjoy!