I used him as target dummy/rotation testing from lvl 76 to lvl 78. Then he became so easy that it was not worth the effort.

If you are pre lvl 80 he is really good to test tanking rotations without much risk. Helps specially in testing the damage mitigation in your tank rotations because target dummies that live in cities don't try to punch you.

Other than that, he is just a funny giant punchsac.