"And how far would that be? It was demonstrated earlier in the issue that Supes could fly halfway to the sun and still be under Max's control. As soon as Max wakes up, the thing starts again."
Follow me here.
Diana is a trained Amazon princess. She's been scoring A+ in hand-to-hand combat since she was 14. Take away her gods-given powers, and she could still go three rounds with Bruce in the dojo without breaking a sweat.
But she can't knock someone unconscious?
"She had to kill Max!" means Diana's an idiot. Which is why that shit doesn't fly. It just doesn't.
"He would've woken up!" Yes, and by that point (and the fact Diana is fast enough to play tag with Flashes, and has direct line to Oracle -- and thusly, has a direct line to pretty much half of Planet Earth and beyond) he's (a) in the Phantom Zone, (b) in a psi-shielded cell, like Hector Hammond or Grodd or every other evil telepath the JLA has dealt with, (c) in a teleport loop, (d) in the speed force, (e) had his metagene removed thanks to science/magic/whoever, (f) is facing down with Athena since Diana had her on speed-dial, (g) is listening to "!srewop erom on droL llewxaM", (h) is listening to JJ and his genie wishing his powers away. Hell, what about (i) "So Clark, you can make it from here to Pluto in thirty seconds. Be there. J'Onn and Captain Marvel will come and get you when we've sorted this out".
*sigh*
I actually could go on. Gimme half an hour, I'll have twenty more solutions for you. I did this once before and I could do it again. The point is, all of those options end the situation effectively with no execution of Lord (and the JLA have someone to interrogate over the mess! What a great idea people being taken as prisoners can be sometimes, eh?).
So don't sit there and shout, "But she had no other option!" She did. A metric tonne of them that all would've worked. Anything else is a bald-faced lie.