I'm using the Last Stand because it has Sahuagin and I have Sahuagin Mastery.
No hirelings / pets / anything else used.
Last Boss HP:
Solo - 2387 - http://i1207.photobucket.com/albums/...ite1Person.jpg
Duo - 2484 - http://i1207.photobucket.com/albums/...ite2people.jpg
Full Party - 2657 - http://i1207.photobucket.com/albums/...ite6people.jpg
Conclusion: elite HP doesn't scale much, which is good! It does scale some though, which is bad.
There is also some randomness in the figures, but I lack the pull to conscript 5 others into running this thing multiple times on elite.
I also evidently lack the ability to be able to do this at level without mild stress. I do not need mild stress.
I have an LFM up on Khyber right now to try and get a 4 person party, but I'm pessimistic. If anyone is bored though....
EDIT: Also, in the Duo one I was a sorc, not an artificer / ranger mutt. Darn it. Someone should do this actually scientifically some day.