Vition - thank you for compiling that. Thats... really an amazing accomplishment by the Clans, given their population, resource base, (often) marginally habitable worlds, second exodus, etc. etc. etc.
I should note that three of the designs we don't know the exact size of. The Peregrine has been stated as being less than 200,000 tons, so my overall calculation used 190,000, it could actually be 200,000 (due to rounding 195kt up as is the norm) or less than 190kt. The Molniya and Corone we have even less information on at the moment (potentially in TRO Golden Century we'll get stats, but *shrugs*), I didn't include their tonnage but I would guess that they'd either be more corvettes or destroyers - though I'll note here that the clans are currently missing home-grown frigates, cruisers, and battlecruiser classes (the York fills the destroyer position fairly well, and is so different from its originating design, the Riga, that it's basically a completely new design).
Re: Alsadius and your NPPC fortress idea
Unfortunately this has some very serious downsides, the primary thing being that suddenly you've forced the idea of surface bombardment on the incoming warship(s). This means that everywhere you've located a battery becomes a target for bombardment, if one is located in or near a populated area, it is your fault if casualties occur. Lastly, in a (known) fortress world vs. warship fight, the warship always wins - the warship can remain outside the range of whatever weapons are located on planet and bombard them to smithereens at its leisure all it takes is a bit more exact math than normal space combat.