PVP Question: What class(s) does Summoner have a harder time with?

[Kakujima]

So, after hours of watching hundreds of PVP matches, I've seen Sums get slaughtered by Destroyers and Wardens a lot... and I mean a lot. It seems to me like the warrior classes are a pain in the ass for Sum.

 

Do you guys have any advice on how to counter Destroyer and Warden?