https://www.fflogs.com/reports/AtkDh...one&source=171

This looks like the log in question, or at least, one close enough to the one in question.

Your Shinten usage is disturbingly low, while your Gyoten / Yaten seem abnormally high. This goes towards Kenki mismanagement which is going to be your primary method of improvement, as Samurai Weaponskills are fairly straightforward and without much room for improvement.

Your Hagakure usage seems limited to your opener. The commonly accepted ideal approach is to alternate between Midares and 3 Sen Hagakure's for SHinten Spam.

This is because Midare is itself a GCD while Shinten is OGCD. The two math out to near the same Potency in the Hagakure transfer, but as Shinten is OGCD, it doesn't delay -further- GCDs if that makes sense, and becomes a gain.

Here is a similar timed run with another higher DPS Samurai
https://www.fflogs.com/reports/4PhwX...-done&source=7

The per-hit cast is less important than the number of casts. (His gear is likely better than yours). The two most important parts of increasing DPS is priority of action use and uptime.