What is the best map at LHC in terms of EXP per Monster?

Party bonus isn't affected by HS, so it's less than 250%.
My level 104 couldn't get through a Door set up by a bishop inside. Haven't tried family tele.
As far as I could tell, non-leechers don't count towards the party bonus. Since Locked says otherwise, I will check again later to make sure.

What do you mean by saying HS doesn't affect party bonus? It affects all exp gained, including that from the party bonus.