I agree with LeaderofAtlantis in that the Automaton is your main asset. I would recommend skilling up outside of Abyssea, for one, and not overlooking the importance of skill.

Also, a lot of jobs can't solo Tier III chains on their own, so just that is impressive. At 75 we have 3/4 of the Tier II properties, which is more than most jobs. The DD frames are great for parties because of this.

Though, taking subs into account, you could create a chain with your puppet that causes Distortion, [Meditate] during that, and close with Stringing Pummel, causing Darkness. Just a thought.