actually it is possible to make the drk start from marauder, and give it a special trait that increases str and atk and loose def/vit in exchange, like they had similar in 1.0 with job traits, can also make it that drk cancels out enmity boosts from all abilities, there are many ways they can approach this, i just wait to see what happens

and i agree with a few of the other people, DONT make ninja a tank, or give it abilities that allow it to tank, make it a dps as it was originally intended like in ffxi