User blog comment:Don7/Ch. 705: EPIC/@comment-14885023-20130410173800/@comment-14885023-20130410211534

i did here is what it says: Doriki (道力 Dōriki?, literally meaning "Power") is basically the physical power of someone, and as such has a proportion with the Rokushiki skill. According to Jabra, Doriki only measures someone's physical power and does not take into account the powers granted by Devil Fruits, despite that some Devil Fruits' (especially Zoan-types) side-effects directly increases someone's physical strength.[2] No more details were given on how Doriki could be botched by it.

anyway their Doriki lvl isn't an accurate description of someone actual power level.