This is an interesting match up (most CG match ups tend to be interesting to me since you have to adjust your play style against them if you want to succeed). If CG can get on a roll, it can be very difficult to protect the PE Summoner due to her low health. PE has a lot of tools to control the game. So if you play smart and somewhat conservatively with the summoner, you should be able to outlast the CG. This is one of the few match ups that I like to keep and also summon Fire Drake. You can summon this champion next to your summoner if you walls are clogged or destroyed. It can shoot through units to get at the CG summoner.