Base is currently not very appreciated, so why not add a few categories, firstly because it would force people to spend more coins (good for Gato), and we, the community would benefit from it.
Category 1:
Epic/legendary Torso/Legs: 400k
Epic/legendary Specials: 400k
Epic/legendary Side Weapons: 400k
Epic/legendary Top Weapons: 400k
Epic/legendary Transform Relics (food relics, not ascension): 150 k
It would be very useful, since you can have abetter chance of getting items you need, in addition the transform relics section would make progress a bit faster, by giving you myth food at a relatively cheap price.
This would require an upgrade in gold mines as well.
I will come back shortly with those as well.
Naturally you would have to upgrade HQ to level 25, and factories and mines to said level as well.
Using proportions:
The gold mine's capacity would be increased to 30,000 (slightly off, but it sounds nicer)
The gold mine's hourly generation would be increased to 1600 (also slightly off)