"perfect counter to...Aegislash." I'm not too sure how that works, seeing as all it can do is phaze and maybe leech seed? Its STAB is useless, and the listed coverage does almost nothing, as well. And I wouldn't call King's Shield + 3 attacks or mixed Aegislash's "most dangerous sets." I'd honestly be much more afraid of SD. I also feel like questioning why the remaining 4 EVs are put into Speed and not Attack, considering Chesnaught is slow and tanky.