Ahh yes that fight, with the generally true advice as females (both humans and monsters) in the game, does take extra damage from tentacle attack, except the girls in this fight is the exception to that rule... Instead for some reason these girls are weak to smash damage instead, and take practically not damage from any other type of damage(including tentacle damage), so that is the kind of damage you want to focus on to take down the girls. Ofc the game doesn't do a very good job either of communicating damage types either, so if you want a more specific skill advice, see the spoiler below
