Poorly done scenario. Some rooms are really annoying designed specifically to waste your time. Some are so ridiculously deadly that you can lose a party member almost instantly. This was much more of a torture test for everyone involved. No one had fun being involved in this not the players not the GM.
So this is the least fun boss encounter i have ever been part of... if u do not have a good spell craft charicter you cant realy know the itmes are there to help you... with out them last encounter is undoable... o and the magic wepon that bestows neg lvls on those not lawful...super not helpfull.. this was a tpk... not enogh in this to plan for nasty end boss. If your gm takes the senario word for word this is a killer...dont play this one.