I would play
grim lavamancer, this seems a little bit on the grindy end for a burn list so i would try 2 or 3, also you might want
monastery swiftspear, but i understand thet you might want to keep the number of creatures low for
thing in the ice. I would not play mainboard electrolize, the card is vary match up dependent, and a three for one is nice but sometimes its a two damage burn spell for three, and thats a bad rate.
Hope this helps.