Is it possible that Ninja will do more dps than Monk?

[Pylfer]

Their ability to increase party damage on the mob by 10% will make them highly desirable, regardless.

This. Everything this. If NIN are not as high DPS as MNK, they will be highly sought after for their +10% damage buff as it happens every 60 seconds. They will be able to benefit from all of their high damage abilities and keep the MNKs TP up through the use of Goad. Depending on how strong Goad is, they may even replace BRD in some instances... cause while Foes is great for casters, Trick Attack is AMAZEBALLS for literally everyone in the party (tanks, heals, and DPS).