Cerberus is getting on my nerves... (HELP!)

[*~Nirvana~*]

If your really having a hard time, and Carbuncle can't get you through it, I can help you out! You just need to tell me your characters levels

.....Carbuncle? So you're saying that i should use ruby light? thats actually a really good idea!! why didnt i think of it earlier, how stupid of me! THANKS sooooooooooo much (I cant remember my character's lvls off the top of my head but if carbuncle doesnt work i think im gonna flag it)

EDIT: I've tried using Carbuncle but Cerberus just uses dispel to counter it and then after he uses dispel, he uses thundaga... Sometimes one of the characters havent been 'dispelled' so it reflects back to him but thunder magic cures him so its really not working out for me. I'm seriously considering giving up on him but i have a feeling that i might regret this decision later on