you need to use both the air/platform camping, AND grounded near the ledge camping. u have a mirror, and an arrow that can hit from behind (that you can do while mirroring if you are flashy) his reflectors range if he is facing you. try holding your ground near the edge. when he approaches, he has to try and get through our dtilt, our jab, our jab infinite (both outrange and outright come out fast enough after falco misses a jab to it him and set him up to get grabbed or jabbed or dtilted), our AR, and if he somehow manages to get inside it's 50/50 between whether or not he gets utilted or you get jabbed, or they will clank. or you can do a read with WOI but that's a gamble. if after all that he still manages to get a grab on you, he can't do the pivot regrab one because we can footstool (if they perfect buffered) or just jump out of it, so he gets like 1-2 throws on us max then you just go under the stage and plank him hard from the ledge.
he isn't safe on platform because arrows hit from below, when we get the platform we can hold it off the edge near always (platform cancel out of ledge is useful here). then we can just plank the ledge as they platform reads as we can freely take the ledge at that point, and they all try to stop it and they all get uaired. then you have the oh so reliable utilt to get onstage with and that move combos into itself on an aerial tech chase if you will just keep utilting him, it either beats or trades with the spike (near always beats it) and you can follow up a uair.
once you get him recovering, you can intercept him with arrows, AR, utilt (it beats phantasm usually), jab flurry, dair (definitely owns the **** out of phantasm), our that flashy bair. usually wanna stick to the first 4 but those last ones are sex. when he dies, you plank him until he is at like 65% plus with that ledge and platform. rinse lather repeat all of this after first death.
i did all of this critique and falco knowledge lending at 47 seconds into this video, im going to watch the rest of it now. probably won't need to say anything else though