I've watched a lot of people fail at the swimming though sadly.
PoP I rather enjoy very much so. I get to go through my pretty collection of weapons and use them on different ones. The only one that I think might give people trouble, besides the air elementals people hate and getting launched into the door and die, is the demon queen room if they make it to where you can't just go Lawlvorpal.
I prefer to use DPS weapons in every PoP room except the Marilith. They just kill faster than vorpals/smiters/disruptors and you don't get the long strings of 40 swings with no natural 20s.
If I didn't have Holy Silver weapons on me, I'd use vorpals on the Vampire, however.
I don't have a zerging problem.
I'm zerging. That's YOUR problem.