So, this is by far nothing new as there are numerous accounts of people doing this already but I wanted to put my name in the hat.
I just finished solo'ing Onyxia.
At the time of this post the armory has the gear (blues and greens) and talent build that I used
http://www.wowarmory.com/character-s...lrogg&n=reddyn
Loot 177g
Pally and Mage helm
Eskhandar's Collar
Six Demon Bag
Heartseeker Crossbow
Prayer of Fort II book
18 slot bag
couple boe greens
30 minutes to clear trash and down Onyxia, roughly my 5th attempt overall