100% agree, I got one long time ago from naga in the cave, never got another from them since. I would’ve thought minister Cho’s mission would be a great spot considering how many golds drop there during favor but not the case. I guess if all skins were common there would be no fun farming them right?
Sadly I must admit I put around 600 hours into hm chos, yetis, tengu and Naga. Ended up get a good from some kappa after 10 or so hours