Simming in multiples of 6 is your overall best odds!

To me, it's about risk management. Yes, you can get lucky, and get 20/20 by simming 20 at once, but you can also go 0/20. To me, a 0/20 is more devastating than a 0/5. And the odds of rolling two 0/5 together is lower than rolling the odds of rolling 0/10 once.