I don't know what others are talking about, my LNC still does an insane amount of damage, even in the Moogle fight. Only real disadvantage I have in the Moogle battle is that I am a victim of AoE attacks, and I heal myself for that, along with using Sentinel at the right time.

Start with Power Surge, then I begin my first combo, Vorpal Thrust(behind) > Impulse Drive(side) > Keen Flurry > Chaos Thrust, then I continue with Full Thrust(front) > Leg Sweep > Blood for Blood > Doomspike, then I do Power Surge again, then I repeat the first combo, and then I use Full Thrust(front) > Heavy Thrust until combos come up. I keep a pretty well consistent DPS pace with this.

I'm sure there may be better ways, but I found myself being efficient with this setup. I think anyone is a great DPS if they learn how to use their combo system efficiently.