So good job pairings I’ve found:
Cleric/Dancer - Basically an unlimited map healer that can buff and cover 2 magic weaknesses
Scholar/Merchant - Cuts SP costs in half, making management much easier without plums (bonus for Rest and Money+)
Cleric/Scholar - Lots of MP, healing, 4 elements, and potent nuking potential
Warrior/Hunter - Covers almost all physical weapons, strong physical Skills
Still playing around with how to optimize Thief and Apoc