The Tavern

You can get to abyss before lair if you play abyss knight, the hard part would be surviving it.
Just throw some really tough, executioner style monsters into dreamland. It means that people don't want to spend all their time in there (because of the monsters) and it stops low level people from grinding (because they have no hope of killing the monsters.)

Your point was about infinite XP. How are you going to earn this infinite XP if you die?



That would make dreamland useless for all the purposes it's supposed to be used for.

@murma
If I understand correctly, and the dreamland is supposed to be an escape button, than it could still work if the monsters were rare enough. Plus, you can leave the dreamlands at any point you want instead of having to bumble around for a way out like in the abyss, so even if you are in melee range of the monsters there's still hope.
Also, wrath idea:
Balor traps you in the dreamlands. There's one exit, and it's on the other end of the floor. Can you get to it before the monsters get to you? Your mana does not drain while you are in the dream, but it does not regenreate either, and you don't leave when it hits zero. Or possibly your mana does drain. I dunno.

We should probably just make the monsters scale with XL. They should be challenging, but rare, and not deadly challenging.