Actually Failure named priest from Risen had 2 or 3 part of Tier 3 in hes healing gear at Mt.Hyjal/Black Temple, probaply becouse of the set bonuses.
I've done once BC-Naxx with my blood elf paladin, it were quite fun.
Most of guys were in Merciless, t4-t5 and we had 40 guys but it were still hard on some bosses, we didn't even do 4 horse men , neither Kel'thuzad or Sapphiron. And most of guys were experienced from Naxx pre-BC.
You can do BC-Naxx for the fun, i'd say:). Some encounters are really well made, and i bet some pally/warrior (or nasty hunter) would like to have the Corrupted Ashbringer, it's fun to walk in old school epics.
http://www.youtube.com/watch?v=7uilPGcc ... ed&search=
Theres you a one nasty, nasty hunter. And even a blood elf, *hrrr*.