I need some help with BTN to try to buffer my account there i consider that is very hard to seed and also to buffer your account with some GB to try to obtain a superior rang.So my question is what i can do to try to have a better ratio ther.
i know that is ratioless but i need sincerely to obtain there a superior rang.

You don't need keep ratio to level up to next user clase, read the wiki.

You need:
Total data: That is upload + download, just download large season pack.
Bonus points: Fill request, and seed large season pack long term.
Snatches: Download daily episodes, upload anime (The number include other people snatch your upload. eg. you upload a torrent and 15 persons download it, your snatch number will add 15), you can get anime from nyaatorrents and upload to BTN.

Read the wiki carefully.

If you need to make fast upload and snatches - upload torrents, or autodl-irssi will help you