Proper Path before Demonis?

[ckdamascus]

I can probably clear Greenwort, Vernlon, and Arlania (I think I have the Freedom Isle maps already too and Merlasser?).

It just looks like it would take a little bit of time.

Should I do all of them before Demonis?

I don't know if there are any "easy battles" I should save. I didn't use a scanner if one exists.

aka like Skull of Pain sort of items? (actually, being a warrior, it is best served in the normal form).

I'm trying to religiously use up all my valkyrie skills to get the last medal, but honestly it seems like they just ask for more battles the more you use them?

Thanks in advance!