Short version:
Try to draw a lot of cards and get the few minions you have out as early as possible.
Upgrade the spellstone to the maximum so it revives 4 minions, and since you only play 4 minions you have a 100% succesrate to get the combo off.
-1 spellcost ( radiant elemental)
+5 spell damage(malygos)
x2 damage (velen)
Mana :
Turn 10:
play Spellstone (-7 mana)
(radiant elemental, velen, northshire and Malygos come in to play)
play Mind blast x2 (-2 mana)
play holy smite (0 mana)
2x mind blast + 1 holy smite = 54 dmg.
and you can get even more depending on what you get from shadowvisions.
Longer version will be updated if I hit 50+ likes!!
Enjoy the deck!