Another 4-2 to play

My first instinct was 6-2 4/2*. It’s the only safe play, it evens the race and starts an attack on whites back checker. But what happens after? We don’t have a lot of ammo to continue the attack. It then occurred to me that with whites home board blot, getting hit would not be disastrous. Further white would like to use a 1 to make his five point, so if we leave a blot on the 13 he would be less likely to cover that 5 point. I kind of like 13/9 6/4, creating a broken 5 prime.