Hexarms 1, 2, and 3 were solidified early on. I'm confident that they are optimal in this range of speed. Arms 4 and 5 however have many variations, and I've found so many layouts in the 360-370 range. That track on arm 5 is a bit of a pain point-- 10 free sum if you can get rid of it cleanly.

I predict that no solves will have a faster rate than this in the top 20. I usually advocate slower and cheaper but production puzzles are naturally more pricy. I'm interested to see if any cheaper solutions do well. I couldn't find any decent layouts below 200g.