The electricity is what is destroying you. 15c/kwh is just way too much. Gotta love those greedy city public utilities.

Going forward the name of the game is going to be whoever has the lowest electricity and most efficient setup for converting that electricity into hashes. The person who has that setup will ALWAYS make money. Why? Because if that person isn't making money then no one else is! There will be people who will run at a loss but they'll eventually wise up and pull out.

When figuring to mine or not the first thing you should look at is the electricity cost. If you can't get less than 10c/kwh, definitely don't mine.