Top 10 units for an INT Team (in no particular order).
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.
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.