The Wrecking Ball Achievement is where you get 20 Killing Blows in a Single Battleground with out one death. I do not have an exploit that gets you killing blows easier but this exploits helps you not to die.
What you do is go into EOTS and using previous knowledge of jumping off the side and falling to your death not counting as an actual death. So basically what you do is when you are close to dying, jump off the side and commit suicide. Its not counted as a death in the battleground so you can continue to get Killing Blows and get the Wrecking Ball Achievement. I have tested this numerous times and it does work. I will post pictures when I get on and do it again.
Update: Glad to see it is working for everyone!
Just glad I finally found something I could use to help comtribute