Ice, Fire, Storm, Myth & Balance for sure. They all get an attack all enemies spell at a fairly low level. Death too, if you have deer knight that is. Farming Couch Potatoes with a life is not suggested, it will take too long. You can use treasure cards too like Meteor Strike, Blizzard and so on if you don't have an attack all enemies spell. The mob to farm? The Troubled Warriors in Sarvastad Pass for sure. 310 health. Really easy. I hope this helped.
wizard