You're gonna need two pairs of cuffs, pretty much mandatory. I have a 30" waist, not a ton of real estate and I don't want anything behind my gun, so I have a double case to save space. Mags are vertical on my strong side right up against my belt buckle. Everything else (taser, radio, light, cuff case) is crammed onto the weak side of my belt.
I also ditched my baton to save some space and weight, right after I completed FTO. If I have to thump someone with something, I'll just use my flashlight, it's usually in my hand anyways. ASP was always awkward and slow for me to draw anyways.
Suspenders make a world of difference. If they're authorized (or there's no policy on them) I would pick up a set and save your back. They spread the weight between your shoulders and hips, feels more like a vest.