Step 1: jettison the idea of trying to build this with only one make of modules (and case as well, apparently). All you're going to accomplish is hamstringing yourself by being unable to add things that AREN'T Intellijel...and this is a pretty serious error!
Step 2: try a bigger case, especially if you're hell-bent on using W---I---D---E modules such as the Rainmaker, Metropolix, et al. Right now, those things aren't doing you any favors; the Rainmaker and Metropolix alone take up 70 hp, and that has just a touch more than 1/3rd of this cab's 3U rows being taken up by just TWO modules!
Step 3: don't take my word for it. Get a copy of VCV Rack if you don't have one already, then try setting this build up in there. It won't be 100% exact, but at this point it doesn't matter, because the idea here is to show that what you've got isn't adequate as far as sound generation is concerned. Jim is VERY correct; module redundancy is actually a thing that SHOULD happen in some cases (especially VCOs...you can't set up a fat, detuned sound without that second VCO) and trying to avoid this is not something either he or I would recommend.