After reading your "Advanced Rules" section I knew immediately that you truly understood how to make good builds instead of those people who just go "hurr durr, Heavy Caliber, second Serration, must have".

Something I'm curious about is how you decide on building for status procs. I assume you just look at the fully modded status per second and compare that to a threshold. I understand why you would want status per second for Corrosive but it doesn't make sense for Gas. Since Gas procs inherently scale off the damage of the hit, it doesn't matter how many procs you achieve each second but instead the percentage of hits that achieve a Gas proc. You also gloss over the effects of IPS in this aspect, they heavily skew which procs occur which you mention previously.

Also might I interest you in the joys of using Hammer Shot in place of Vital Sense, linear scaling after all. Especially on something like Rubico which has natural linear crit damage.