It would have been interesting to have asked top STS players to review the most popular guides for each character and then to compare ones they determine to be 'strong' or 'misleading' against model performance.
Just reporting the data outright seems lazy.
Looks like Argon wasn't covered here, but I'm getting the sense that Argon made similar leaps as Astra did. I would certainly be curious how Argon would have done here- it did quite well on RuneBench (https://maxbittker.github.io/runebench/).