Only 4 shots have some troops falling, but not caused by Leia’s laserblast. Rather than duplicate any frames from these said footage, perhaps you can use CGI to come up with an alternative shot of that same angle by adding a few falling troops and use the smoke diffusion in front of the troops, that was established in these footages, to your advantage.
You can never discount the possibility that a shot could have been moved in the timeline I have not really looked at it or looked for there being any discrepencies in this part, but what you are saying does make sense that they came in there to rescue Princess Leia and she end’s up rescuing them. Does it matter that she does not shoot a storm trooper? Not really but It does fit the narrative that she becomes the Hero. Almost every gun battle has footage in the wrong order but I must admit the cell block has always felt like the best gun battle that was not messed about with… It would require a bit inspection of laser bolt angles and do they correspond with the person firing them and does the angle match up… That would be all you could perhaps deduce but it is certainly not out of the realm of possibility it had shots moved about given the state of all the other gun battles but there would be no need to create CGI storm troopers.
EDIT:
I can confirm that Lukes laser blast down the corridor after he get’s off the radio was moved so you have made a valid point and that shot’s were moved about looking down the corridor but not scenes with the actors weather that means Leia shot a storm trooper remains to be seen but good shout 😃 The Chinese puzzle can begin.
My only gripe on this one was the controls being shot on the other (last) Door to stop more troops coming in which sealed off their “only escape route” was used for the Blast Door that sealed Vader off from docking bay 327. If you watch carefully Han Nearly hits it as he is running then the storm trooper shoots and I imagine the door control is then destroyed a short insert of footage. In the following shot the door control is intact because they probably blew these things up at the end of shooting the scene, so the door control would need cropping out of the scene where the storm trooper waves on the others to make it a scene without problems. Or it simply is inserted after the stormtrooper waves the others on.