Quick question concerning Chocobo Companion Roles.

[Ramiren]

To be honest I'm a white mage, and I've found the companion utterly useless, it prevents you from mounting up when it's summoned, you can't queue in duty finder, nor can you undertake any instanced quest content when he's out. They also take an eternity to level up, requiring you to grind mobs rather than do fates or quests, which will severely slow your XP gain.

I have the tanking tree and he never takes aggro so that tree is useless.
As for the attack tree, if a white mage can clear the game with her low offence, no other classes should have an issue.
And for the healing tree, as I mentioned above you can't use the chocobo in any content where you actually stand a chance of dying so it's pretty pointless.

In short, ignore it don't waste your time levelling it.