Things that can help the to get higher scores on Odin/Bahamut:

1. Treat the fight as if your party is the only party there. (This is a major boss you focus to survive.)
2. Few/no deaths, and everyone is going max dps/enmity gains.
3. Bind beforehand at the nearest aetheryte just in case, so you can return to the fight quickly.
4. Try to minimize stacking classes to increase LB progression
5. Try to have a MNK or DRG for the most potent single target Limit Breaks.
6. Use LB at the proper time (during Zantesuken on Odin, for example)