The champion abomination is actually quite easy to solo. The first time I ever did it was on my hybrid-condi thief. I would just auto attack right in its face, then as soon as it would start one of its highly telegraphed attacks, I would use Death Blossom to avoid all of the damage. The hardest part about this is the following:
#1: Resisting the urge to go “all out”. The important thing about the giant is to pace yourself. Attack too quickly, and he gets fury and starts to pwn you.
#2: The ancillary mobs around him will sometimes aggro you and cause major problems if they happen to imobilize you at the wrong time.
#3: Some ch00by fr00by n4rb will see you soloing the champion, rush in with full offense wanting to “halp” or get credit, and then mess things up for everyone.
With that said, a really easy way to solo the champion is to circle him while meleeing, and you’ll avoid most of his attacks. Doing this, I can solo him with a zerker build S/P thief, as well as every other class I have at 80 at the moment.
I don’t have opinions. I only have facts I can’t adequately prove.