The key for me is always to get the crud that builds up around the top of the ball joint cleaned up. This allows the socket to get a good set and grip on the ball joint. Once cleaned up, I soak it with KROIL. I use one of the specialized sockets on the ball joint with the UCA mounted to the car. The socket is on a 24" breaker bar and a 4 foot long cheater bar slipped over the breaker bar. Try to keep a 90ยบ angle between the breaker bar and the socket, otherwise it will hop off and may hurt.
Just about any RWD Mopar repair manual covers the subject. Haynes manuals are ok, but they have the ball joint removal all wrong. They say the UBJ is a press fit. Not so.