Oh my not an ideal matchup.
Start off with Electroweb, aiming at his legs to stick him to the ice. He might not even care since hes only attacking specially.
Next, get near him before using Protect. He probably won't melt the ice around him with his flames but it should at least soften it.
So, use fury cutter, aiming at the ice around him. Ideally, it'll break, and since he's sttuck to it they'll sink a fair way in the icy water.