Calculating all that three times per round (once for every attack, with the to-hit scores differing) is a lot of work, and you tend to miss one or two things.
So I thought I'd make a Pathfinder Combat Tracker: input your regular attacks, the circumstantial bonuses you could get, and let a machine do all the work! And because you'd want this in a handy form factor, it would have to be a smartphone app. And because I don't fancy coding for both iPhone and Android but would love for the app to work on both, I decided to make a HTML5 application for it.
I've decided on JQuery Mobile as my platform (a good excuse to learn about JQuery itself too), and so far, things have been going quite well. However, I didn't really think things through, so I have had to re-write lots of code when I got new insights.
It'll get done eventually.