I completely disagree. You still want to squeeze most of your stuff into TA in your opener to get as much burst as you can. (At least the burst is crazy on NIN.) I use this Opener: http://ffxivrotations.com/271x
This one needs a bit of practice because it is pretty fast and you will of course clip.

Ninja is a burst class. TA is perfect to give us more boost while bursting, so we need to put as much under it as possible. While Bhava will almost always fall out of TA, we need to make sure to line Bunshin under TA while not overcapping Ninki. This also needs practice. Kassatsu, Dream and Assassinate, will always be ready for TA if we keep them under the window. While Bunshin is on the first, on the 3rd, on the 5th and so on. Use Bunshin always over Bhava.

With the loss of Slashing, Fuma is weaker than Raiton. So we use Raiton now, even with clipping issues.

Using only Mudras as an Opener, well... this is not Naruto. It will suck. And while checking this Person from the Videos, well all i can say is... Gray.