I also saw that prices of difrent things are more various.you could then do it like this, if you have the perfect amount of faith there is a very high chance that you will get a follower with exactly the same price. it would then be possible to search for the things you need by properly controlling the amount of faith. for example, if you want to get a familiar you would try to have exactly 14 faith
Currently cards already have a 50% weighting boost if the difference between your faith and their cost is <=3. I don't know if I want to boost to be even higher than 50% tho, since that could result in you always getting followers that cost exactly all your faith, making you unable to save up and make your decisions less varied