When upping the difficulty on single player mode, when does it apply?

If I am attacking Mephisto on players 4, then up it to players 8 before he dies, what happens?

noting happens

does it apply to the area?

Players 4 on worldstone 3
then 8 on throne room?

It applies only if the monsters arent spawned yet

General idea on old d2 with maphack/monsters show on minimap, unsure of d2r radius tho but same concept

As for the baal idk if his hp pool spawns in throne itself or just when entering the keep, ud have to test

This post was edited by Haseo on Jun 21 2022 11:49am

Only monster I know it applies on even if it's spawned is countess. Spawn her on p8 for the difficulty, then switch to p1 when she's almost dead and you'll get p1 loot. Win win if you're playing p8 and want runes