The best is to do them all, every day, for about two hours before practice, lifting the fingers very high up and pressing them down with all the strength you have while holding the forearm and the wrist absolutely rigid and tense.
Then find a good doctor, because you'll need surgery.
Seriously, search for "Hanon" on this forum, and you will find out what people really think about it and the 3/4/5-finger myths.