Does this mean you'll always call if you have 10 outs and are getting 6:1 on the pot and his stack? Or are you still making the necessary considerations as to whether or not you'll likely extract enough money to make a call profitalbe?

I'm just a bit confused by the idea of 'minimum' and 'ideal' values, unless you're using these to make your decisions in certain spots.

Do you never call with 15 outs if you think you're getting a price of 2.5:1, since it is below your minimum?

The 2% per out per street approximation isn't too difficult to do and i'd say is probably at least as reliable as rounding approximations.