I just want a moment for some appreciations for the fight choreography here.
First, when he knew he is spotted by the enemy, Crowley prioritized placing down the injured person, secured the Chorozoball, and going for the friendly approach by introducing himself to him. He gets to use his staff and potentially has the option to go offense or defense first, but decided to let go of his staff and try having a talk, even to the point of honestly revealing his past, because he's aware that the enemy revealed themself first to him. And yes, all of this is in one page of a few speech bubbles.
And then, knowing Chorozo's help is out of the equation, from a rather casual action of picking up his staff while continuing their conversation, Crowley immediately turns it into a quick thunder attack. Then the old man, as a more experienced magic user, has already prepared his clones beforehand. Then, as they're exchanging information, both don't waste any moment and keep anticipating the next actions they are going to take, which also give Crowley time to prepare for his surprise counter in the last moment. However, as a wiser person, the old spellcaster not only dodged his attack but also use that to his offense.
No mundane yapping, no unnecessary movements, every second is utilized, as both of them were portrayed as two very incredible mages with their own quirks and talents. It's like watching a real duel between two people that was filmed frame by frame.