Remember those centaur-like things and the ghosts flying around that were much harder than other mobs, ppl used to call them mini-bosses, and dropped worship lv40's and the dread lv45-50 sets??
They aren't there anymore. Alien abduction??

They're sometimes there, and they're sometimes not. Idk the deal with them, maybe they spawn only when the troll does? I know they were there the other week as my guildy, who was helping me to level in the 3rd floor, decided he wanted to go see if the troll was there, and I ended up wasting a res rune from the aoe's of those little b*ggers. Other times though that room has been earily empty...

I can pretty much swear they had regular mob spawn cycles.

But it's not all, in AN, the mini-bosses on asta side rooms used to be like 10-12 in each room, now only 2-3. And the Asta vipers and guards were also missing, and these I'm 100% positive have normal mob respawn

dread mobs in AN have 30min respawn time ..
and nightmares in fl3 dont have regular spawn tho .. i`d say like 1-2h respawn time
maybe someone killed them all before u came ?