Mulligans
General Mulligans
Get all your draw, the combo, and clears.
Aggro Mulligans
Clears and spell damage, heal, and draw.
Control Mulligans
Single target removal, damage spells, and the combo
Combo Eureka! with Electra Stormsurge while you have a Malygos in hand, and against most decks both will survive until the next turn (except against warlock and priest, they have twisting nether and psychic scream) Then on the next turn you can do any combination of 2-3 damaging spells to kill your opponent. Zola is in there to copy Stormsurge into your hand; You may use it to double lightning storm, or healing rain, and then Zola to add a copy to your hand for the combo later. Sapphire Spellstone is basically a filler card, if you don’t have enough damage and your opponent clears a maly then you can triple or quadruple it up to get more spell damage.
EDIT: Storm Chaser draws you Eureka! or Volcano, Witchwood Piper draws you Thalnos, or if you already got him, an Acolyte, Electra, Mana Tide, or Zola.