Whippet_basic posted...Another trick people have found is to lob grenades in through the entry teleporter to wipe enemies out before they can even touch you.
Yeah I don't like that, you'll lose a bunch of xp.
On a similar note, I started the game over, and there's that early trap where you get ambushed by three skeleton warriors (second level, I think). Kind of funny, I just threw a torch onto the pressure plate from outside the room, it closes the door and launches the ambush... and all you do is open the gate and fight them one at a time.