Tough one tbh and think it is wide open nowadays. Could say a 22/19/7 grinder is a winner but could be terrible post flop and have tons of leaks elsehwere.

It is easy to play ranges but not easy to make correct decisions!

Psychology and intelligence does not really come into play when trying to multitable. The best you can rely on is your HUD. This could be a way to determine a player's level. If I see that he almost never limps in to see the flop, or has a reasonable cbet rate (not 100, but 60-65 maybe?), I could conclude how advanced they are. Just from these numbers.

It's especially hard, because to some level it depends on what type of players sit next to them.

I think we're still a long way off from knowing the answer to all this.

I would say that so long as you are in the right ball park for your pre flop stats then based on your post flop skills you could still crush beyond all imagination, or be a massive loser. A lot of the post flop stats are a function of the people you play against, and how well you are prepared to exploit them. So many players today are not really thinking deep about exploitation, they're just clicking buttons and worrying if their fold to turn raise stat is 2% away from what their mate told them it should be.

I don't really think that chasing the perfect spectrum of stats is the right approach anyway. Spend your time and efforts on learning how to think about poker and your results will take care of themselves. It's nice to know if you're a mile way or close for certain stats but it's not the be all and end all.

Oooh no one said snowie yet?

When I messed around with snowie, it concluded that I was a world class player. I didn't even look at the cards, just tried what if I raise over and over again. That was enough to be a superhero.

I think it's a little dangerous to try to achieve an ideal set of stats at the expense of your results.
I try to approach my play to exploit the players at the table.
I like to play a little fishy pre flop e.g limp - against regs in order for them to open up wider and essentially start spazzing out😆.
With the fish I'm ABC tight aggressive as the majority of them are calling stations.
At the stakes I play (10nl) I tend to find my best results are achieved with a VPIP of 16 - 19 where the "recommended" stat is 22.
I find this a bit chaotic when multi tabling in the 12-15 tables range.

I agree Houdini 101. Do players bet too much or call too much or 3 bet too much etc etc, see what their weakness is and then counter it.

I don't aim to stick to numbers, the point was to profile other people.