As others have suggested, the std springs and shocks do a pretty good job on 'normal' surfaces. My car came with the uprated front ARB, and it does reduce roll on most direction changes - eg roundabouts. I wouldnt make 'air' an important part of your shocker specs - unless you want to be able to change the ride height easily. To be able to use adjustable shocks sensibly you would need to get systematic, recording a starting setting, driving a course you can readily repeat, documenting your impressions, change the settings, drive, record etc. In many cases you would find that the handling has gone downhill, and need to back your changes out one or two steps. Notes - changes to one axle will produce possible unwanted changes in the other axle's behaviour. Your best bet would be to find somebody else who has been down this rabbit hole, arrived at a good set up, with documented settings, AND you find their car's handling is close to what you are looking for. Dont forget that the car's handling can change depending on its loading in terms of passengers and baggage. And that the front shocks EXTEND on bump, unlike almost every other car I know.
Here is an example I have been through. Mate and I built the Almac below from a kit. 775kg empty, front springs 250 lbf/in, rears 175, adjustable AVO shocks; MX5 1.8L + 8lbs of boost, 215rwhp. With both of us aboard (him 80kg, me 100kg), driving briskly, we got too much bottoming of the rear. We tried hardening the shocks up, but the ride was unpleasant. Got some spring advice, and went to 210 lbf/in, softened the rear shocks , problem solved.
Pic will follow when imgur recovers....