One of the really interesting aspects of the Crisis on Earth-X crossover is that each segment had the crew of that show filming it. And while all the shows exist in the same universe, each series has their sort of niche. The second part of the event was an episode of Arrow, and while it was mostly seamless in that it felt like part of the whole and not an episode of Arrow, when it came to the fight scenes, it was definitely an episode of Arrow.
This part was directed by James Bamford, who has been the stunt coordinator for Arrow since season one and in the last few years started to direct. And where the other series tend to do a lot of CGI, Bamford is a practical stunt person — so when you see someone going flying across the room, someone really flew across the room. The Inside video for this episode of Arrow shows the coordination for the fight between Dark Arrow, AKA Earth-X Oliver Queen, and Wild Dog, Black Canary, Mr. Terrific, Heatwave, and Killer Frost. The fact that Dark Arrow wins and then he and Green Arrow fight to basically a draw (until DA is distracted)… just shows what a real badass Green Arrow is.
Arrow airs Thursdays at 9 p.m. ET on the CW.