I recently discovered this little bug that allows you to get near 50k hp on a hunter.
This works on Chaos Crusade.
Reset your talents and put the songflower vote buff on you.
Spec down the survival tree and put 5 points into survivalist.
once you did that cancel the songflower buff and wala you just gained a few extra thousand hp.
repeat the process, on CC funserver if you go to close to 50k you will get disconnected.