So after reading up a bit, I think I understand the concept of MAGs and how they work:
They provide stat buffs to your character based on their stats, they have an attack ability that charges up, they increase in level and get new stats based on what you feed them, and they can evolve into new forms based on their stats.
My question is, as a new player, how do I know what kind of MAG is most effective for me? I see all sorts of guides for how to get a particular MAG form, but I'm not sure on how I decide what form I should be going for in the first place.
Thanks for any help you can provide!