their is no best method
you simply try what is the most suited one for your game
it's useless to use a one method for all
BTW
srep:m3f:a16:d1g+nz (nz with o/O will give you better ratio than xz/lzma2 with the same time if you used much ram & more threads )
for zlib I usually use ppx2 with precomp038 it's the fastest way until now
for pzlib you know it will be a good replacement for reflate & Antiz
but still using ppx2 with precomp038 faster than pzlib for individual files