So after you get the quest done (Open the Waygate) you play the extra turn. You play Grey Sage Parrot before you do the combo to get another turn to do the combo, you play Target Dummy and Mimiron's Head then you can play it with a biscuit kept in hand from Conjure Mana Biscuit. Next turn you should have 22 damage. If you have potion of illusion in hand you can copy the both the minions and win with the second V-07-TR-0N, in that turn you should have 38 damage, if you play the second grey sage parrot for 1 and end turn you then have 44 damage and if you have another potion of illusion then you can play the 2 other V-07-TR-0Ns and then get 76 damage in one turn

I may have overlooked Potion of Illusion it makes the minions 1/1 instead of keeping their original stats this is no problem though as you still have the damage from the original V-07-TR-0N added onto it so you'd do 32 damage in two turns with it alone then you play a potion of illusion to get another turn. The only problem is druid as their health is mostly armor anything else is ok if you can pull it off