For me, it's usually:

1. Ramza - Squire w/ calculator or summoner

2. Mustadio - Engineer w/ chemist

3. Samurai w/ Monk

4. Bard w/ Priest or Dancer w/ Mediator

5. Any monster I have (usually Boco, the chocobo gotten in a fight when you still have Gafgarion with you)

As for equipment... I try to vary, else I use what I currently have on.