Hi there !
So this deck works like a basic Quest Mage, you finish the quest and draw the combo pieces and survive using Ice Block, and here is how the combo goes :
You play Archmage Vargoth and the Quest to get two extra turns .
Next turn you play Kalecgos and Greater Arcane Missles and attack with Vargoth for 20 damage .
Final turn you play Malygos and 2nd GAM, attack with Archmage Vargoth and Kalecgos for another 54 damage so you get a total of 54+20=74 damage split among enemies .
Arcane Giant can be used if drawn with up to 8*2*3=48 damage over 3 turns for both giants making the full combo a 74+48=122 damage .