Mulligans
General Mulligans
Don't mulligan for 1-cost spells, you can't use them early game anyway. Target Sheme, Frog and Witchdoctor (and Witchdoctor activators too).
Good news, we have new hope for Malygos Shaman with dragon package. Although, 5 dragons is extremly sample size, it’s probably enough for that unitless deck. Cycle with Spirit of the Frog, don’t waste Lightning Bolt and Totemic Smash without back up plan, because it’s part of your main combo. Platebreaker here just to make you comfortable against Druids and Warriors.