Lucius:
12:18, Today: Lucius rolled 8 using 1d8.
12:17, Today: Lucius rolled 8 using 2d6+2. Lay on Hands Lazarus.
If I roll 8 but only effectively heal 5 because of Lazarus max hp. Do I take 8 or 5 damage
Just the 5 - you can only absorb as much injury as was actually there
Leila inspects the bodies to make absolutely sure that none of them will get up again. She is satisfied that they won't.
Istvan looks carefully around the room and the adjoining hallway. The coffin room does not appear to have any more secrets to give up (or if it does, it's not giving them up to him). Nothing in the hall immediately outside either, but then a moment of bravery and inspiration leads the cleric back to the fork that had brought you here. In the darkness he can't see exactly what's down there, but it does look like there is something that will merit further exploration. Of course, you'll need a way to get past those traps. Maybe something in the room full of detritus and dead bodies can help with that?
Incidentally, while you are searching, you get a sense from that mace you found like it could potentially help in this situation. You'll need to spend some time studying it before you figure out how though.