After attempting to do it, last friday. Then constantly being griefed by random folks, finally towards end we gave up, because entire other group showed up, just griefed us, then started their pull.
Everytime we got close to ending fight(8% health), some *******(s) would run in, fighting the thing, causing everyone to get killed.
This particular world boss should become an instance based one, because of the mechanic that's involved in it, it's silly & stupid.
JJ