Was intrigued so wanted to try it, put it on tactics folder, and open the tactic on the tactics screen, says the tactic is already fluid for me

Then I check the main unbeatable tactic I'm using for PSG for 2 seasons (145 goals in a season, won 35 of 38 league games lol), and this one is identical to it except for slight tweaks for CM/SS positions, and one FB instead of IWB, rest are identical, except the corner instructions you specified. I'm speaking of the comed fixed one posted in this forum a while back:
Guys after so much time of testing others tactic and making mines finally founded a way! 3 tactics from TFF's Hot Tub rating best average score per game and best average conceded per game I have done insane season using this 3 tactics with Hajduk...
fm-base.co.uk
If its as close to it as it seems, then yeah this tactic of yours will be ridicolous.