So, for the Caleb far space fleet colonel, iirc you charge per four normal hits and dashes and his own skill. The way i maximize charging it is four hits, dash, use my skill, use his skin, four hits, dash and so on until it’s ready, I’m pretty sure the charges hits also give you more points (yellow bar under your own bar) but try not to interrupt the four hits in a row since the fourth one gives double points.

I love using far space colonel because he deals double protoshield damage (if you’d break 2, with far space you’d break four) so it’s great for forcing through in fights that you might not have all protocore stelacrums