Edema and Blisters. Solved By Pumping And Silicone Glans Cap?

I am concerned about the localized swelling/edema, and also about the potential for blisters. I am thinking that the use of a penis pump would help to increase the level of conditioning, since the pump would place high levels of suction on the glans, etc. I have also read about using a silicone glans cap while hanging in order to prevent blisters. What are you thoughts about these two ideas?