Again, you forget that memory isn't the only balancing tool.
If you read what I wrote, I specifically state that it is regardless of those other restrictions, that having more 'mega-nukes' still increases the frequency at which you can deploy them.
If increasing that number comes at the expense of multiple smaller ones, it is a choice to make.
If both cost the same, you take the bigger ones, because it'll diminish your flexibility to a much smaller degree.
