Suddenly I see an area formula emerging.... then depending on area.... overall performance.
The only one which is subjective is the visibility. The rest can be pulled from known data.
Not quite, because that again, is assuming every one of those metrics is weighted equally. And in what context do you apply corresponding weight, to a 1v1 fight in the DA or to overall MA performance and success? Each will have differently weighted metrics.
For example in the DA, the difficulty in aiming the tater is far reduced, because the fights are so close. It is easy to be a tater stud in a rolling scissor whereas the difficulty with the tater in the MA is a different story all together.