I read the rules and look at the gameplay diagrams and see no

"draft pile"

or anything.

sometimes it says that the draft pile is shared others suggests each player has their own.

There isnt even a clear explanation on how to employ them! and by the way everyone seems to plan out their deck without them in consideration, I don't even think people use them!

What in the world am I meant to do?

Those cards are included to allow you and another player to draft decks out of the core set of cards. It seems that concept is not very popular, since no one ever talks about it. You can basically just ignore them. I use for making proxies, since they have the same back as the other cards.

You only use the draft cards if you are playing the draft variant of the game, that is detailed towards the back of the rulebook (pages 18-20). It's an attempt by FFG to do booster draft in a game with no boosters, frankly I don't think it works very well but the rules do make sense.