Don't lock your self into a specific ratio for any morph. You will end up with to many males. In you example you said 1.2 pastels and 1.2 spiders. You would be better off with a bee instead of a pastel male and a spider male. If you have the room don't sell any female morphs for the first few years. if you get to the point that you are female heavy with a certain morph trade for something else you need. You snakes will be worth more the older they are.