Light, Vannille and Sazh.

I open up with Bully (COM+SAB+SYN) if I know I don't need curing while I'm setting my buffs and dispells up.If I know the enemy I'm going in against is way tough then I'll run Evened Odds (MED+SAB+SYN).
With enemies as tough and capable as they are the buffs and dispells are needed no matter what.
After haste (the first auto-cast) I'll let some more buff be added...but no matter what I always jump to Relentless Assault (COM+RAV+RAV)and juggle that into Aggression (COM+RAV+COM).
For aggressive healing I put on Combat Clinic (MED+MED+SEN).
And with me using Sazh all I had to do was teach him Sentinel and Light Cure and I'm good.

Funny thing is, I thought those last few spots for paradigms would open up on their own...I tried it one day and saw I could assign 6!
GAME OVER!

Hadn't had much of a problem since.