what the best 3 character to use ?

i at chapter 10...

my 3 character set ( Lightining , Vannile , Sazh )

nice this 3 combination...
my lightining Atk : 435, Magic 250
Vannile Atk : 110, Magic 310
Sazh atk : 165, Magic 285

really nice combo so far... sazh give ability to my character Speed,Damage,Magic damage , while vannile give enemy slow, taking more damage magic/physic.. after get all buff.. i change all my character to Rev.... very fast get critical.. then i change to Comandos(lightining) Sazh n vanille (Rev)... so far like this combo...

seriously i don like using fang/snow as the party while lightining as leader , hard to clear monster...

the maximum damage so far i can go for hit monster by lightining : 7740... hope later can make max damage 9999.....