H
An assumption since we don't know what it does
Devil Fruits, Haki and physical stats (i.e physical strength, speed, etc) are used as sources of power that work in conjunction with these aforementioned fighting styles.
We know CotC is powerlevel related. The stronger you are, the stronger your CotC is. So Jozu was in effect saying Shanks' strength is amazing 'as always'
We know CotC is powerlevel related. The stronger you are, the stronger your CotC is. So Jozu was in effect saying Shanks' strength is amazing 'as always'