u can add damage by increasing arcane power. there are several cards that do this. also sometimes going insane is good with the one that adds arcane power and taint. makes it a race to see if u can kill him before dying. that ilness will add a lot of arcane pts aka damage
 "Elements"){kind=icon}
 "Merlin's Revenge 3"){kind=icon}
 "The Necronomicon"){kind=icon}
 "Heavy Weapons"){kind=icon}