I don’t think there is an easy answer to that question, especially when you are asking about multiple decks. Building a mana base is one of the hardest parts of Magic deck building and it’s also why Magic is an amazing game. You can build your mana base off of statistics by adding up all the colored mana pips and doing the math to see the percentage of each color, you can ignore math and go off of personal preferences, for example, always wanting the same number of basic land types in a deck, or you can put in the lands you have on hand and see what happens. I think you should test out each of your decks with your friends or by yourself and see what works best and makes sense. Take notes on how often you get flooded out, how often you are short a specific color, and how often you wish the land you just drew was a dual land or a different basic land type and then adjust as needed. Personally, I have put hours of practice into each of my decks and even after playing them for years I still find myself analyzing the mana base to see if I can streamline anything.