On a per-game basis it's Kenny Walker's Junior year.
Link to Season Unmodified Tendex Rating per Game
For those of you who are confused by all this, Tendex is actually a well-known rating system that has been around for nearly 50 years. It was developed by a guy named Dave Heeran. (BTW, Martin Manley's efficiency rating is essentially the Tendex as well.)
Heeran used to write these long treatises about why his system (which he tirelessly promoted for over 30 years) was the best, and why the coefficients he used in his model (which all happened to be 1.0) made sense and best reflected what was going on in the game etc. And he wasn't really open to debate about this at all, even though I thought some of his arguments were circular and hard to justify.
The 'modified' tendex is kind of my response to this. It uses the Tendex as a basis, but took me about five minutes 'to develop' and uses coefficients which I considered at the time I made it to be more useful (i.e. the weightings were changed to give some factors like blocks and assists etc. more weight.) BTW, that's why you see someone like Ulis with a higher modified Tendex than a standard Tendex.
So in a way it's kind of a joke to counter Heeran's adamant stance that only coefficient of 1.0 make sense. But it does have its uses, and people can use it as they wish.
If you want to know the details of how all these are calculated, it's outlined on the page below:
Various Efficiency Ratings
BTW, for a long time I've been thinking of adding PER (Player Efficiency Ratings), however I always get hung up with the fact that it was created for the NBA. I'm still not sure how it should correctly be translated over to college basketball (and not sure those who have published PER #'s for college players have accounted for this either). I've consulted with a few basketball analytics guys about this issue and they seem to be stumped as well.
Also if anyone has any ideas or wishes for other player ratings systems to publish for UK players, I'm always open to suggestions.