What's unfortunate is the small size of enwiki8. A decompressor with a high upfront cost (say a pretrained model) and otherwise higher compression ratio would

What's unfortunate is the small size of enwiki8. A decompressor with a high upfront cost (say a pretrained model) and otherwise higher compression ratio would be more interesting than tweaking yet another PAQ8 variant, but I'm not sure this contest's rules make that very viable.