Okay I was checking out some of the old FF games and... they should apply some of these to dancer.

Dancer (Tactics)

Slow Dance: Dance lowers enemies' Speed level by confusing them with slow dance movements.

Polka Polka: Dance with vivacious moves. Lowers physical attack power.

Disillusion: Dance lowers enemies' magic attack power by distracting them with a mysterious costume.

Nameless Dance: Dance with unexplainable moves. Causes various abnormal status.

Last Dance: Ultimate dance. Turns enemies' TP(normally was CT) count to 0.

(FFX-2)

Sleepy Shuffle: This dance will lull enemies to Sleep.

Dirty Dancing: This dance, will allow the party to hit with critical hits within a time constraint.

Carnival Cancan: This dance allows all party members to have double their normal amount of HP.

MP Mambo: While this is performed, all allies can use MP freely at no cost.

Tempting Tango: Inflicts Charm on one opponent.

Just some Idea's of what dancer used to bring to the table... and why we loved them.