Let me sum up all this algebra:

Weapon grid is more important than having a p2w Eidolon when it comes to power up a team.

Having a p2w Eidolon is more important than whatever other options there are.

Olympian Eidolons will be the best option available for f2players. But again, the p2w ones are (generally, or always?) better.

Is that the correct conclusion?