Towel Nami: 8.5/10 Captain Ability: 2.5X ATK to INT units. Special: PSY orbs turn into INT orbs. HP: 1990. ATK: 949. RCV: 168. The ability to switch your team's weak orbs into strong orbs is a very powerful utility to go alongside Nami's powerful captain ability. The only thing that let's her down is her only mediocre stats.
Vista: 8/10 Captain Ability: 2X ATK & 2X HP to INT units. Special: 5000 Fixed Damage to all enemies. HP: 2840. ATK: 1325. RCV: 185. While Nami has mediocre stats and an awesome special, Vista has a mediocre special and awesome stats. Vista has incredble power, but that's not enough to say he's a better captain than Nami.
Top 10 units for an INT Team (in no particular order).