How to I optimize my opener and rotation as Samurai?

[Stormfur]

I've read all kinds of posts and threads talking about 1 sen / 3 sen openers and such. It all seems unusually complex for a class whose rotation really isn't that hard.

I start out with Hakaze / Shifu / Kasha to build up a sen and then use the Kaiten and Higanbana DOT first. Then Hakaze / Jinpu / Gekko -- Hakaze / Yukikaze and Hakaze / Shifu / Kasha again to build up 3 sen. Then Kaiten + Midare. Rinse and repeat.

I also throw in Shintens as often as possible and reapply Higanbana when I can. But according to people in my party, I still don't do enough DPS.

What am I doing wrong?

I also try to save up Kenki for that big finisher move - I forget what it's called - but you get it at the very end. Guren, I think? Can I use Kaiten with that?

Help!