For what it's worth, there is a full listing of the various Paradigms at EoFF, here...

Paradigms - Final Fantasy XIII - FF13

My favourites varied as I changed them often depending on who I was fighting. By far the most frequently used would end up being...

Relentless Assault (COM/RAV/RAV) is easily the most commonly used one. Decimates most enemies just by the constant tapping of the X button.
Aggression (COM/COM/RAV) once an enemy is staggered. This keeps them up in the air for as long as possible, causing maximum damage without receiving any back.
Diversity (COM/RAV/MED) for when I need a quick heal.
Solidarity (COM/SEN/MED) and Combat Clinic (MED/SEN/MED) are the most common ones I use for emergency situations when facing enemies that require a Sentinel.
Tri-disastor (RAV/RAV/RAV) combined with Salvation (MED/MED/MED) provide quick destruction & quick healing for when you need to rely on speed to finish off a battle.

Others tend to only really get used for boss battles, and that's when you have to get a little more tactical, so things such as All For One, Hero's Charge, Bully, Thaumaturgy and Dirty Fighting etc. can come into play.