Found this old replay with the same strat happening back in Dec 2018 with a little teamwork.
https://youtu.be/Xqn0hu2A9ug?t=1458
See, its fun and balanced back then, because IS had 15% less moving accuracy then they have now.
Now its overpowered and unacceptable, because combined arms shouldn't be a thing in this game, also overpowered on the move accuracy of every single other rifle squad.