I agree that Guin is not invincible. Totally far from that.
If I have to nerf Guin, it would be that there are too many Guins in the diamond league. The defense is so monotonous to the point it’s boring. Either Guin or GM for most of it. I don’t even see Ares much anymore. Defense is now slowly lacking imagination for most players. It’s come to a point people not thinking of ways to improve anymore but more like just get a Guin first and get the rest later.
My opinion is that Zeline is more of a pain in the a** than Guin. 