Best Compression Methods for 'Specific' Games. Q&A

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Maybe can somebody please explain reasoning behind God of War Ragnarök method that is posted by xtool creator on Patreon...because it is not that this method does not work, rather I don't see why it is required.
Method posted is, I quote:

here's the method to use: -mlz4f:d1:l2:s512m -lm (if you have a lot of memory, you can set 1g for the s# parameter)

Since I'm getting pretty much the same (ok, few GB more) final size like FitGirl got (67GB with one language, 85GB with all languages) WITH ONLY srep:m3f+lolz I curious on what files is lz4f needed? Or should I say, even if there are lz4f streams in game why xtool is needed at all if I can get same size without it? I'm just searching to reason to use it, since I have every respect for Razor12911 opinion and posts. Regards