This is my understanding also. You'd want your springs to be soft enough to allow suspension compliance over bumps, but not harsh. This allows the tires to remain in contact with the tarmac. The sway bar helps share the unused spring resistance from the inside wheel, allowing softer springs to be used. Tuning your shock absorbers will control frequency of suspension.
As for sway bars, adjustable is better if possible. I used 4140 solid round bars for mine, heated & bent where necessary, using various diameters for adjustability. For the final topper, I'll send them out for heat treatment. My front bar is adjustable, however I actually made 2, one with longer lever arms, but I had to add a second mount since they reside at different locations relative to the suspension. For my rear, I've made 2, one smaller diameter than the other. This for tuning, as the working end is non adjustable on the rear. Hope this helps. Lots of books on the subject are out there. It's not black magic.
Now, keeping your motor from blowing up, that's black magic! Good luck.