Ninja vs. Dragoon

[Allyrion]

Importantly, DRG buffs BRDs, and upcoming Machinist (and is the only one to do so), so if you have one or more of them in your party I would consider DRG.

NIN provides an opener burst buff (with trick attack) and also tank damage buff (slashing debuff), which WAR also provide, but at the cost of mitigation/threat/damage.

I mean, Trick attack happens throughout the fight as well.
I would think NIN would be slightly above DRG due to Trick Attack.

Then again, buffing the BRD damage is more significant than buffing Tank damage. So I guess it can go either way.
If your BRD or MCH (though we don't know MCH damage type for sure yet or if they get their own debuff) is really good, it might make better use of the debuff as well.

Have you done the math in your sim between this?
Trick Attack mostly affects the opener, but since it's also a universal damage increase every minute I would put more value in it.

I think NIN has more utility overall, DRG is more damage focused. That difference seems to be going further in HW.
If you lag, DRG might be more enjoyable unless you particularly like NIN.