It's up to you. I like to micromanage everything so, the most I ever play at one time is 3, sometimes 2, but usually 1 at a time.

Well, considering that you want to able to quickly check on your games before you go to work/school/whatever and you need at least 5 minutes per game, which isn't that much, you'd need qt least 35 minutes just for quickly checking every game. Also when you are just quickly looking in every game to see if something happened, you'd also need these >35 minutes. Yes, checking your games every 35 minutes is even good enough when you are in a fight, but you probably also want to do other stuff in your free time than playing Con. And if something happened, you'll need to spend more than these 5 minutes to give your orders.

Of course it's up to you, but if you want to keep doing other things than this and keep being more or less active, that's not that easy with 7 games. But I'd like to hear how you manage playing 7 games at once.

I think that with the increase in the number of cards, their quality decreases ... this is my opinion.