i like playing with spring rates so ive tested pretty much all the viable shock and spring options for the scx10. It really depends on your driving style, the terrain you mostly drive on, shock length, truck weight, etc... it all affects whether a sprung, droop or semi-droop is the best for your situation.
For me for example, if im driving mostly on my rock course, i prefer to stick with full droop and a VERY soft internal spring between the bottom of the piston and bottom of the shock cylinder around the shock shaft. This spring helps keep the suspension compressed, reducing the likelihood that the shocks will "unload" and push your truck off a sidehill or super-steep incline. This setup compared to a soft sprung setup basically lets me full throttle and steer, with no worries of flipping, even on the steepest parts of my track. This with longer Duratraxx alloy shocks gives me about 6" of articulation, but a crazy amount of torque twist (it 3-wheels up most hills).
However.... if I'm driving in the forest, to me nothing beats a semi-soft sprung setup. Extra clearance, less chance to bind a stick or small rock in the drivetrain, and enough anti-squat (but not too much) to give me some wheelie/hillclimb power.
I don't claim to be an expert but those are my opinions. BTW my truck weighs 7.1lbs and im VERY twitchy on my throttle, so i tend to snap stock driveshaft pins more often on full-droop