FWIW, my math[^1] suggests with current system we'd need 22 more candidates to handle Cool, bringing the total to 52 candidates.
IMO Cool candidates are important to have, perhaps we can de-optimize something that won't have a huge performance hit, while reducing the candidates to saner levels? [1] https://irclog.perlgeek.de/perl6-dev/2016-12-29#i_13819263
