Can someone post whatever gear calculator they're using to figure out BIS stuff?

And preferably explain how to use it if we wanted to see what's best depending on which pieces we currently have. More or less just how to remove whatever pieces we don't currently have from the equation while still outputting the "best possible" set available when still having multiple pieces to choose from in a given slot (or more).

I just think it'd be nice to know what's "best" at any given time instead of just the "end all be all" so it would seem useful to be able to use whenever since the whole point of BiS is to find that small difference which should apply at all times....right?

If so, thanks.