Not sure, i mean he was able to not only match Superman and other powerhouses but he seemed more powerful. I wonder if any others remember him, and how powerful he was. When I read his mini seires I was under the impression that he might be above Surfer, but I could be convinced otherwise.
Something else worth mentioning,
before Weird assumed a 'physical' form, he pretty much toyed with the collective efforts of Superman, Guy, Dr. Fate, Captain Atom, and J'onn.
__________________ Harry Callahan: Well, when an adult male is chasing a female with intent to commit rape, I shoot the bastard. That's my policy.
The Mayor: Intent? How did you establish that?
Harry Callahan: When a man is chasing a woman through an alley with a butcher's knife and a hard-on, I figure he isn't out collecting for the Red Cross!