Okay so I had a lot of fun theory-crafting NIN's Optimal Single-Target Rotation (I'm 34 atm)... I'd love your input/thoughts:
Huton > Mutilate > Spinning Edge > Shadow Fang > 1-2-3 > Suiton > Trick Attack > Kassatsu (every other) > Raiton > 1-2-3 > Spinning Edge > Shadow Fang > Mutilate > Raiton > 1-2-3 > 1-2-3 > Repeat (replace init. DoTs with an extra 1-2-3)
Weave Buffs where able & Mug when buffed.
The long CD's cause the awkward mix-up in the latter-half of the rotation ~ Huton (70s), Trick (60s), Kassatsu (120s, hence "every other"), & Ninjitsu (20s except for Kassatsu use).
From a complete Theory-Perspective, does this appear optimal? The timing seems to fit neatly. DoT placement is a bit odd (may also be reversed?) but it seems best to get them ticking & then slot them in alternatively with the timing (to get the "every other" effect like MNK).
For reference:
Huton - AS Buff for 70s
Mutilate - DoT 30s
Edge/Fang - DoT Combo 18s
Suiton - enables stealth attacks
Trick - damage buff
Kassatsu - refresh critical Ninjitsu
Raiton - big hit
1-2-3 - ~Aeolian (damage) or ~Dancing (debuff)
The 1-2-3 combo option will depend on if the group has a WAR to apply the Slashing Debuff instead, otherwise it'll always end in Aeolian.