With all due respect, I don't think you have defined the end purpose of your intended rig adequately. For instance, if the rig is ultimately intended for gaming, that rig will be quite different than a rig designed for, say, patrolling your property or, to take an example a little further out, one set up for combat. If you're a cop, your rig would be different still.
In addition, you have not specified the type and capacity of the magazines (rifle/pistol) you intend to use. We need to know that, specifically, as not all rifle and pistol pouches take all mags equally well.
Might want to take a drink of water every now and then; you didn't mention hydration. If gaming, probably not a high priority. Anything else, and it can become a high priority quickly.
Prioritize (be realistic!) the intended purpose of your rig, and we can possibly help you. If you are interested in gaming shooting sports, then I suggest you take close note of what the winners use. You can't copy their acquired skills, but you can take advantage of what they have learned about gear easily enough. Other applications have different models from which to choose.