NIN has lowest individual damage ouput out of the three melee classes, yet in the end it's the most desirable, cause it can boost other's damage. it provides a nice way of hate management which could potentially lead to more damage. also it has access to goad, which in long fights or heavy aoe fights could result in... ya you guessed it... more damage. their own aoe potential got boosted in a recent patch as well.

for your lnc "issue". just do dungeons, leveling roulette, weekly challenge log and leves/fates while you wait on queues