Yea..NINs are tankers, they are very different from SAMs. While SAMs do dmg/skillchain, NINs tank using the Blink Ninjutsu Utsusemi.

At first, its hard with only one blink spell, after a while they get another one, and its easier to hold hate. They use Enfeebles to keep hate, and must keep hate up with voke and keep blink up. Utsusemi juggling is very important later as Ichi spells dont override the Ni ones. Its kinda challenging to play and expenisve cuz each cast, is 1 ninja tool. Even with two stacks of 99 tools for Utsusemi, it can burn up fast. And you need other powders for enfeebles...o.oa