"Rolls?" Har har a decent pun...
The role of a sway bar is to reduce leaning in a curve. Shock absorbers and spring's role is to reduce bpuncing and hobby horsing. My tag axle air system is for the latter. Under and over axle springs on the rear driver to manage weight.
But sway bars are next to useless to control hobby horsing and wallowing.
To cure lean springs alone would make the ride like a buckboard. I've got four Donaldson shocks in the rear and monsters for a Peterbilt in front. The effect is to minimize my poor driving skills due to advanced age.