Here I just made that for you.... i went through your settings and i see that you use lzma a lot.
So i thought maybe i give you something i used to use a long time ago
literally i havent used lzma since i discovered how to use lzma2 instead but
I took the lzma code from lzma SDK and i compilled it using x64 settings to the profiler so it can use more than 3 gigs of ram, also i renamed this to lz77 since lzma is a pure lz77 compression algo.
I did that in order to trick it and use this one instead of the lzma that arc.exe has inside
pros and cons :
pros:
1) its fresh code and updated, the one you see as freearc-lzma is a decade old code
2) its supported in freearc and it has stdin and stdout options classically
3) 13% higher speed over freearc-lzma
cons:
1) its still slow and it has made little to no effort to change style, if you consider time as fact respect and embrace lzma2 as i did
how to use :
[External compressor:lz77]
header = 0
packcmd = lz77 e -si -so <stdin> <stdout> -a1 -d30 -fb273 -mc10000 -lc8 -lp4 -mfbt4
unpackcmd = lz77 d -si -so <stdin> <stdout>