MagesPack DiskSpan integration?

[ozerune]

I've spent the last couple days going through these and have managed to get the ratio down to 80%, but the install takes 15 minutes for an 8GB game, which I feel is a bit much. The majority of this time comes from the png mpk files which take (in my opinion) absurd amounts of time to both compress and decompress. For these files I am using

xtool:d1:mpng:mreflate:dd3+LOLZ_NORMAL

Even with just using lolz normal, it takes a solid 1.5 hours to compress 3GB of PNGs. Is there some other compressor I should be using for PNGs? And is there any way to add more compression after using bink 2 and oggre without costing too much install time?

I am a massive visual novel player and those are the main things that I want to back up so I imagine all of these will be used often.