Renose does all combat calculations (but he no longer shows his work tsk tsk). You just need to input stats and pray that you don't fumble.

EDIT: [url=https://www.youtube.com/watch?v=k6DUudmKqEE]Keia, if you still care (don't remember if you ever did), CloserS has their CBT up now, and there's a bunch of gameplay vids to fangasm over.[/url]