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.

[Efrye]

[...] I've found the companion utterly useless [...]

While I wouldn't call it useless, I agree that it's not very helpful with the game in its current form. I'm sure there will be content later down the road to make them shine - maybe even a dungeon designed around companions - but for the moment it seems to be a gimmick at best.

As for choosing a role, I think the safest bet would be the offensive skill line. As Ramiren pointed out the tank role doesn't appear to be very reliable. You can probably make it work by letting your chocobo build some hate first, but it seems very situational.

Healing might be useful to some degree, but their potency and intervals between cures seems rather low. However, keep in mind that skills get more expensive further down the line. The last attack skill costs 10SP - enough buy the first 4 healing skills for example. So I'll probably end up with a combination of healing and attack to get the most out of my points.