In addition to what Dom has mentioned, Rancor Collar won't do anything for weaponskill for samurais outside of the accuracy on it. Great Katana weaponskills cannot natively crit, so the +5% Critical Hit Rate on Rancor won't do anything for you. One of the elemental gorgets corresponding to Shoha would do you far better in that regard.
My thoughts and reviews
Lady Jinte wrote:
Vlorsutes' Negotiation Skill rises 0.2 points
Vlorsutes' Observant Parent Skill rises 0.3 points
Vlorsutes' Argument Diffusing Skill rises 0.1 points
on all sorts of sci-fi stuff...and things.