@Richiroma the thing is, fixing your ratio can be really hard depending on how much you have downloaded.
If you have downloaded 100GB and uploaded 10GB (therefore 0.1 ratio), uploading 100 GB would be enough to increase your ratio to 1.1. And it would be very easy to extrapolate this, and upload 200 GB, going to 2.1.
But if you have downloaded a lot more, let's say 2TB... Uploading 200 GB will be just 0.1. A pretty negligible number, despite the effort needed to upload 200 GB.
The first thing you need to do is check your numbers, have a good idea of how much you need to upload to achieve a ratio that is satisfactory to you.
If it turns out to be a big value, there is no easy way, and uploading your own torrents will be the fastest and most reliable approach.
As you have pointed yourself, freeleech torrents have a high demand, this means you are competing for the opportunity to seed. If you spend your own points to make torrents freeleech, you are contributing to increasing the ratio of all other seeders, and you might never get to seed it yourself, or seed only a small fraction.