This is what I did:
Getting past the initial gate to get in the knight's tomb is easy, just send someone through w/ teleport and then use the pyramids to bring everyone else through.
If you have to fight the knights, distance yourself as much as possible, as one hit is an insta-kill. Get a ranger to use charm arrows, or someone who knows rapture or has love grenades to charm them, so they fight each other until it's down to the last one, and then use something that freezes them (arrows seem to work best) and hit them w/ ranged attacks.
For getting around, I used a combo of the resurrection skill and the pyramids. It was tedious but it worked quite well. I didn't have any good perception and I honestly didn't think to just toss the pyramid up the stairs. So if you're having trouble with that: Have one guy be a guinea pig, and attempt to find the right path. Have another who knows the resurrection skill teleport via pyramid every handful of feet, making sure to stay within the perimeter of the resurrect skill, if you get out of range you're sol, and you'll have to start again.
When your guinea pig inevitably gets smote, resurrect him as far as you can drop. usually, even if you resurrect in an area that would have killed him, for some reason it won't strike if you resurrect (but it will if you use the regular teleport skill. idk why. weird). You can easily get up the stairs this way.