I'm pretty convince on 13/11, 6/5 for 2-1, but I would like to hear what others think on the opening roll of 5-1. I move 24/23, 23/18 with 5-1. This gives me a good chance to make my opponent's 7 point, which pretty much cripples their chances for locking in my runners. Also, if my opponent hits my blot without covering (and a cover there is pretty unlikely, just 4 rolls out of 36, by my count), I have good chances to hit back (any 6 or 7) on my next turn. Plus, every time we trade shots on my opponent's 7 point, I gain in overall pip count. What am I missing here.
I consider myself an aggressive player, and I regularly slot the 5 point with both 2-1 and 4-1. However, with 5-1, you can't generate any cover for that slot with the 5, which makes 6/5 more dangerous and less rewarding.