Wow, you have taken into account creature's enhancements. I don't bother, because SSI will take care of it. On ALL my hunts, I use 2 to 4 hp of an imp,so I never use a full imp. However, I use SW, FS, LD, and other buffs to reduce the chance of using an imp in the first place.
I really like this part of your response:
1-hitting is about max kills per stamina spent. Unnecessary reliance on stamina-using CA defeats the purpose of it.
I 100% agree, however sometimes you need to use CA. Otherwise, you end up getting a lot of potions and buffs to do the same thing that CA would have done (raise your attack and damage in order to 1 hit). That was my point.
I know you were just trying to help,
I appreciate that.
Also, I would greatly appreciate advise on 1 hitting for level 400+. If you could post a link or post the set-ups, I would be in your debt, as would most of the players looking at this thread for advise.