I was going to completely skip the current INT Vegito banner, but thinking about the ideal rainbow Gogeta team made me realize that INT is pretty much the weakest color in the game.
In going for a rainbow team, TEQ has a lot of strong candidates, and even if Vegito is the best TEQ option, it's not a major loss to use Majin Vegeta (post-Rebirth) or SSJ3 Vegeta instead, enabling INT Vegito. What else is there for INT? Super Janemba is probably the best INT card, but it links poorly with the rest of the expected team and has more utility as a blocker. What else is there? SSJ Trunks (Rebirth)?
STR: SSJ Gogeta
PHY: SSJ Gotenks
INT: Vegito
TEQ: Majin Vegeta (Rebirth)
AGI: SSJ3 Goku
Flex: STR SSG Goku
Or abandon rainbow and just double up on TEQ, ignoring INT.