Haven't checked any of your math. But I'm confident that either spawn rate and/or category mods and/or the whole system will change for next age. This 5 weeks age is a test age, and I would guess that Jeff and David accelerated sci to be comparatively quick, as to simulate a longer age.

Edit: On test server you could gain runes casting on ritual for instance, so the code is worrisome, but I doubt it'll be allowed to work like that during a real live age.