Interesting study so far.
I'm afraid based on those three parameters I am unlikely to move up or down very much in my use of the delegation. I am constantly curating new steemians, as such I want to give them a significant bump, so I give higher percentage upvotes, but limit myself to a minimum of around 75% VP. That limits the total number of votes I will give out.
I will always spread the vote around to as many unique steemians as I can, and try to curate and upvote all of my comments, so maybe that will positively impact my standings. We'll see!
The script I use to run this report is very coarse so don't take it too seriously. There should be other metrics I use that are more subjective, such as:
I think your current voting stats are very good.