I said Nu Mou but here's something to do with Moogles, easiest with Lini.

Get Mog Knight Skills, Ultima Charge is ESPECIALLY important.

Change into Gunner.

Get Concentrate.

You can now use all of your Charge moves (including but not limited to Ultima Charge) with the range of your gun, and will hit 95% of the time.

Have fun and play nice!