I don't believe it matters, but if you're into testing, I do believe some late game dungeons cause a slow drain of stamina by moving around. I forget the names of the places or how they're rendered in English though. There's a volcano, and in Gatonazo a girl gives you a quest to go to a place that's like a marsh area that drains stamina. I don't think I was wearing anything that would cause that sort of thing to happen normally.
Yeah I figured there'd be some fire dungeon eventually since there's an item that cancels stamina loss from burning. I don't have it unlocked yet. I've had times where my Stamina drains incredibly fast in dungeons, but I went back to the areas I thought that happened in I'm not losing Stamina anymore. Might be if you clear the dungeon or level up enough or something it no longer happens. I thought maybe the Burning debuff would do it too. Guess I'll see.
Kinda nice how I can set things up to learn more about the game even if most this shit doesn't work out though, lol. This game is way too complex. Imagine all the shit we're probably all missing just by not explaining/testing everything we do here in excruciating detail. Hope the Satiety and Stamina thing is the worst of it, lol.
Edit: Yeah, seems like Lunatic Party can't inflict debuffs from "On attack" stuff. I figured, that'd be pretty broken. I might just have to wait until I find another area that drains Stamina really fast. No dungeon I have does that anymore. I think it happened to me in Nadehan Marsh, Deep Mines, and Underlake Kaier. Not only does it not happen there by default, but I can't seem to pick up any debuffs from those areas that do it either. I haven't even cleared Underlake Kaier yet. Tried Night time too, maybe low Satiety does it? Geez.
Edit Edit: Alright one mystery solved I think. Loaded up an old save and my Stamina is now draining in Underlake Kaier without even moving. I'm losing 1 Stamina every 10 seconds even when idle. It appears tied to your level, because both Stamina drains are gone completely in low level areas and disappear in higher level areas that had it previously after leveling up. Weird part is sometimes the Stamina drain seems tied to movement instead, but now I'm getting conflicting results in a different save, so I have no idea. At least I found the Stamina drain mechanic. Now I can just afk for... 33 minutes to test this, lol. I'm pretty sure it can be faster, but I can't seem to find a save where that happens.