Thats a lotta math.
Good rule of thumb is for real lowbie sorc, use max only on bosses or in big fights. Once you have a little more manna to play with, in most quests you can pretty much keep empower on, and throw maximize on (as well as empower) for big fight AOE or end bosses. And once you are level 10 or so, you can keep maximize on and use empower in those types of situations.
I have a lot of respect for anyone who can perform (or even follow) the math used above. I know I can't. For my own math-nerfed purposes, I have found that the above rules of thumb (along with the appropriate crit and damage enhancements for your element of choice) deal enough damage to carry the day. I still remember the first time I used max and empower together along with a greater combustion scepter and saw the bright red triple digits rising up to the sky from the ogres in my firewall.........