@sssr That was the impression that i got as well, though without seeing the raw it's also possible that the seemingly inverted labeling is a joke on the asterisked note that there are many different standards for slime ranking. Also, it is amusing that the lowest ranked slime has Yoshida's hat and glasses.
Edit: Also, though there is little medieval history content in this chapter, I think it qualifies as a fanservice chapter, since the most realistically proportioned we've seen Yoshida is when she's being assaulted by the slime.
It's silly but I used to kill slimes in games without any problems, then I read a bunch of Dragon Quest doujinshi involving cute slimes and other monsters... Then suddenly I feel bad killing them :v
I like how every other Fantasia page ties the events and themes of the entire chapter into real world history, but this one has fuck-all to do with anything and discusses the historicity of one single line of throwaway dialogue.