After watching a video of a 57 Resto Druid Soloing I decide to try.  Im 52 full feral spec atm.  It was very easy.  Get him on the main floor and STAY away whenever he does the spinning move with his blades.  If your a druid or a pally you have a decent amount of time to heal.  (Only had to heal once myself)  Any strong melee specced class 50+ should be able to kill him fine.  If your wear cloth I'd stay away (unless your a frost mage) ;o)

Oh yeah...there is a wall on the main floor (straight ahead if when your coming in the room).  Afer you kill him run over to the wall...the adds wont see you and will run down on the main floor.  Just AOE spam and ur done.  Each one only has like 100hp.