I did some testing and found new, easily replicated strat for Jack 2 for New Game easy runs (one cycle). I was able to do it 5 times in a row in training and also during my PB run later. Here is video how to do it:

I started watching the current Madhouse NG WR run by Senpou and it is clear that it is segmented run, it is stated in the youtube video description and you can clearly see cut in 58:17 (after the lucas video). It says in the rules no loading and single segment only, so I think this run should be disqualified..?