You can't factor in prediction since it goes both ways. Will you predict I dpulse and switchin your skarm or will I predict the skarm and use thunder? Or maybe you think that I'm going to thunder so instead you opt to stay in but then what if I think that you'll predict my thunder and opt to stay in and opt to use dpulse instead? Yeah, exactly. Prediction is not a usable argument since it works both ways. The problem with losing half your health and then phazing is you have no control over w/e the hell comes in and more likely than not, it'll be an attacker that can finish the weakened skarm off with ease. Skarm lacks the bulk to take advantage of said utilities, we're not talking about ferro level walling where it can tank hits from the vast majority of the tier while skarm checks far less than it. Skarm struggles with physical attackers bar sd arceus, some exca, some chomp and some ty-tar's while being mauled by common special attackers. Overall it doesn't come close to walling the majority of the tier which loses it's value as a defensive pivot. Can it be good if said team has one of the things that it soft checks? Sure but even so those teams will also have something that remove skarm with ease. Overall skarm doesn't wall enough nor does it wall well enough to be considered mid A. Either skarm goes down or ferro moves up. edit: on an unrelated note, how can you call chomp slow?