If you get into one of those, you get far more plasm than you would have. And you're getting credit for all the NM kills too. Even mediocre 1-5 groups still clear the 5 NMs for 9,750 plasm.

You will have bit the bullet and level a job friendly to that event though but it's definitely worth it to get your foot in the door. For example, you have BLM listed as your main job, but from there it's not too hard to level and gear a decent SCH that can use almost all your BlM gear.