NIN changes and queries

[Seraphor]

I'm not sure about TCJ under trick, it doesn't feel right in my head and I'm not going to say I'm great at the whole theory craft but I feel like bunshin will be the go to for trick window, assuming the clone's damage is respectable and I would assume it is.

My first thoughts too, it seems to make more sense to feed the Bunshin, it's the... cognitively simpler option.
However, if you're out of oGCD's to weave (you only have Bhava, Mug, Dream and Assassinate) and you only have your weaponskills left for the last 2-3 or so seconds, and you're back at the start of your combo...

Spinning Edge is 200 potency, or 400 under Bunshin.
Fuma Shuriken is 280, or 560 under Ten Chi Jin.

If you manage to fit a fifth GCD in your trick window:
Gust Slash is 250 potency, 500 under Bunshin.
Raiton is 400 potency, 800 under Ten Chi Jin.
And you can probably get that Raiton out quicker than the second GCD if you start your Ten Chi Jin immediately after Aeolian Edge, making you more likely to fit it into the Trick window than Gust Slash.

Then... I guess you Suiton and Meisui to get another Bhavacakra, not in the Trick window obviously but quicker than you otherwise would. Unless this screws up your Ninki gauge sync for the next rotation.