imho, putting a blizzard dragon in first row would be beneficial, as it prevents the opponents back-row b.dragons from triggering skills. second, using mass attack units like inferno dragon might make your life harder, as it increases skill buff for all opposing units. and if u r using a blizzard dragon, there's no need for any other defensive/healing units, and u can focus on raising your damage output. and don't forget the option of using buff items. good luck