It kind of depends on how you use your truck, and what components were installed when you lifted it.
For a truck that is only street driven, and articulation isnt a big deal, as long as you installed the 4* c bushings you are fine.
If you installed 4* bushings, and wish for more articulation, dropping the radius arm brackets may necesitate replacing the c bushings with 2* bushings.
Personally, in my dd I use the 7* bushings on ~ 6" of lift, with no drop brackets. I have no problems with how the suspension works, even with mild trail use.