кто первым нанёс атаку, у нас ведь нет взаимно-однозначного соответствия между бросками и атаками.

Hack and Slash
When you attack an enemy in melee, roll+Str. On a 10+ you deal your damage to the enemy and avoid their attack. At your option, you may choose to do +1d6 damage but expose yourself to the enemy’s attack. On a 7–9, you deal your damage to the enemy and the enemy makes an attack against you.