Skeleton King may get into the spawn by getting focused by him > Getting in the front door spawn and then going to the other room at the left or right depending which team you're on (He'll just clip inside it and won't be able to move or attack as long as the focused person dosn't goes into the other room) [He may get inside or just stop on the door blocking the main door to open] I do have some concern about skeletons being able to do that too.

the portals to the underworld does not seem to work

On the 9th screenshot the lights have no logical source (just floating in the room) ; and on the 12th screenshot the lanterns have to light source.