Learning How To Be A Ninja

[Eloah]

I can try an help, though I wont say I'm the best I feel I'm fairly good, though others might have some better advice. HERE GOES NOTHING, LOL

First I will start with the mudras, now that you have all 3. The easiest way to remember the ninjutsu is to remember the ending mudra and whether the ninjutsu calls for 1, 2, or 3, mudras.

Fuma is always 1 mudra
Katon is 2 mudras ending in Ten
Raiton is 2 mudras ending in Chi
Hyoton is 2 mudras ending in Jin
Huton is 3 mudras ending in Ten
Doton is 3 mudras ending in Chi
Suiton is 3 mudras ending in Jin

I would recommend ordering them with Ten on top Jin in the center and Chi on the bottom, since Ten is heaven and Chi Earth. Right now you have Jin on top Chi in the Center and Ten on the bottom. Once you are comfortable using the mudras performing the ninjustu you want will become second nature whenever it is up. A few things about the ninjutsus though:

Huton is your personal buff that you'll want to keep up at all times, at level 54 you get a skill to help with that.
Hyoton is rarely used outside of PvP since the potency is low and it has a bind effect
Raiton or Fuma are your primary single target attacks, though if the enemy has better magic defense Fuma does more damage but Raiton is the go to most of the time.
Suiton is also single target but its primary use is to use Trick Attack and Sneak Attack without using Hide; outside of the story Hide is next to useless.
Finally Katon and Doton are your AoE moves, with Doton being a ground DoT similar to Shadowflare and Flaming Arrow. If there are 3 or more enemies its safe to use either AoE skill. However, while Katon isn't as bad, never use Doton on a single enemy, it is a waste.
In addition, at level 50 you will get the skill Kassatsu, that resets you mudras and makes the next ninjutsu crit.

Okay now that mudras are semi explained, lets try the rotation. To my understanding the rotation doesn't change much from 50 to 60 there are just a few extra skills to weave in. At 50 my basic rotation was/still is: Spinning Edge(SE), Gust Slash(GS), Dancing Edge(DE), Mutilate(Mu), SE, Shadow Fang(SF), SE, GS, Aeolian Edge(AE). With thks rotation you want to try and keep the 2 DoTs up as much as possible as well as the Slashing Resistence Down debuff. All the while weaving in ninjutsus and any other OGCD moves at your disposal.

Adding more in stages

I did write more but my tablet decided to crap out on me without saving, T.T so I will post more tomorrow,