personally, I beat it by using the mirror stone (to get my own 47’s), x stone, and a few 37’s accompanied by 13 for energy, and finally a 23 so I don’t get trapped. Every time you tie should make it a little easier, so you can use their stones against them.
3[77s], 7[43s] Get a starting hand of 43s and a 77, block off the top route, then hope you get another 43 and 77 next hand. Then block them of again. :3