I remember reading a list a year or so ago that stated which classes contributed most and least to dungeon scaling. Now in the wiki, it says that the info was unknown. I'm wondering if the list I saw was legit and if anyone still knows it?

Recently i ran a Druid with 2 Bards, 3 man on Lords of Dust. (Druid & Bard 2 levels under quest level, Other bard same level as quest)

And the HP's of the Death Knights were higher than when the Bard ran the same quest in a group of 4.

How is it that Druid or Bards scale the dungeon so much? I don't think Druids or Bards are powerful classes, compared to wiz's and sorc's and arti's and divines.