I know nothing about jumping your 40 clients. I do know about taking damage from 16 catalysts at the same second though. If we assume that he does that by hand, even if guy is super fast and your client stutter, time between his first catalyst attack and last one is simply too ■■■■■■■ long for logs to go off in one second. If you look at any of his videos and time it, you will notice that it takes him as long as 10-15 seconds to switch between each client and lock/attack target. And in those videos he simply fires of his guns without any additional commands like keep at range (which he did with me).
Not a single valid argument in his defense was made in this topic. Difference in damage easily explained by skill difference + range to target difference + RNG of application/damage value.
I realize that for some people what he does can be admirable. After all, approach is pretty smart and I bet complicated to execute in a way (although he did not came up with that). But blindly jumping in his defense without even trying to understand the situation is just childish.