There is mermaid codec aswell
Code:
Streams: 5305 / 5305
Time: 00:02:26 (CPU 00:04:09)
Size: 16.2 GB >> 16.4 GB
-- Edit --
I don't know if it makes any difference to use this totally not weird looking key, but nevertheless it got some additional streams.
Code:
ue5:k0x0200000003000000020000000200000002000000020000000300000003000000+kraken+mermaid
Streams: 779244 / 779255
Time: 00:29:10 (CPU 02:26:51)
Size: 16.2 GB >> 47.4 GB
oodle library 2.8.14 should be ok to use.
Maybe use zlib after that to get even more. In some cases if you precompress oodle streams, there are several zlib streams behind that aswell.