A ball joint press is a great tool for removing and installing spring bushings. It looks like an overgrown C-clamp with a hole in the fixed pad.
I've used all of the above mentioned methods and in my opinion the ball joint press works best, least likely to damage anything and able to apply the most force.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-