Any successes your opponent gets in dodging/parrying reduces the attack successes. You won't know the total of the damage dice you are rolling until after the attack and defense rolls are made. So, really, there needs to be an attack button, and a damage button (with a query of remaining successes in the attack roll). Will that work/make thing easier? I can also make an all-in-one button, using the "target" identifier, that will roll the attack, minus the defense, and roll the damage minus the soak roll. But that will be a lot of work, every sheet would need a token, and all sheets would need the right data filled out. Plus options for aggravated, lethal and bashing damage. And checking the accuracy of the forumla will be closer to an exercise of trust than anything else.