I tried stonecracker but the compacted size came out larger than rnc propack, as did cranker. Only shrinkler packed my game code smaller than propack for me, but it took about 50secs to decrunch and needed fastram I later found out.
In the end I went back to rnc propack and it unpacked in basic 2mb chip ram (AGA).
Propack for king ...for games