Gonna put a big heavy "You have no evidence of anything" on the OP. Every fight in the game is scripted to heck and back, and roulette content like Nier raids will be something players have most likely done often enough to accurately preposition for mechanics.

Even up to the Ultimate level, you can accurately preposition for most mechanics and predict where and how to move far ahead of time--this is, in fact, the metagame of jobs with a lot of cast bars. No tool is really needed.

Then lets turn around and ask why someone would bother cheating in roulette content like 24 mans in the first place. Especially outdated roulette content. There are no leaderboards to cheat your way up, and with 24 people, one's own increased contributions don't amount to enough to go out of your way to install a timeline or anything.

We all agree cheaters should be removed from the game. However calling any and everything out as cheating when your only evidence is partial anecdote is only going to dilute what people think cheating is and cause witch hunts, and witch hunters are imo worse than cheaters.

Tldr: man cheating must be super common in low end content if you have to make up your example.