Oh I know there's BiS, melding just makes it more flexible.
And I recently got in touch with an old game mentor from my noob days who mained Ninja since it was added and he said there is actually a detriment to having high skill speed as Ninja as it can cause the TP mannagment issues that we can usually avoid.
Also said to focus on Crit->Det but keep both up.
So yea, talking to Raiders helps alot. (Also mentioned ACC cap can usually be reached with out melding) But its not like I've mained Ninja for more than a few weeks sonI'm still getting the hang of the finer points. Lol