Cannot believe I missed that cave. It's right there! Thanks. I don't actually see the script it looks like you tried to post about Waki, though that's probably fine; missing answers right in front of your face is the curse of all programmers so I get the idea.
Anyway, there is one oddity I noticed: upon promotion (tried two different tier 5s, happened both times) that Mage->Hexer->Chemist->Barrier Mage I've mentioned a few times loses Boltes (though Heates and Morpae are now properly upgraded). Is that intentional?
Also, while I'm waiting to see the last class to decide what to promote my avatar to (Elementalist has good growths anyway), I did test promoting and it did reduce the number of Changelins in my skill list back down to one.