Cost vs return - aka worthiness debate

[elit]

One thing i was considering to try is uharc(for games). I know it have a 2gb file limit though and its single core only. But I was thinking "maybe if I pipe it in freearc through <stdin><stdout>" and bind it into 4x4, then FA would run 4 instances on separate blocks(just like it does 4x4:lzma on -m5), would that work?

Something like:
-mc:4x4/4x4:64mb:uharc

packcmd=uharc {cmd} - - <stdin><stdout>
unpackcmd=uharc {cmd} - - <stdin><stdout>


Or like that, I wonder if that would give visibly better ratio than lzma since uharc is a multimedia cmp...?