First and foremost this post is about the Dugu 9 Swords Swords featured in SPW/ State of Divinity, NOT the levels of swordplay in ROCH found in Dugu's cave. The thing with Dugu 9 Swords was to either wait for your opponent, and then attack yet faster and at a point in which they must defend causing you to have the offense or striking without stances (slashing endlessly). However this works only because when you make a move at a person's area that's undefended, they'll surely move back and defend fearful of losing their own life. However what happens if it were someone who wanted to go on an all-out suicide attempt and did not care about death.
From this excerpt it is clear that with Dugu 9 Swords makes it so that although you attack second, you will be the first to deal the damage. But is this always true? Hence going back to the suicide theory."Missing out on the grab, Feng Buping immediately drew his sword and slashed it at Linghu Chong’s back neck. Following normal sword art principles, Linghu Chong should have jumped back quickly before returning the attack, but with all his internal energy in a state of complete chaos, which prevented him from using any bit of inner strength, he simply couldn’t jump back to dodge. Having no alternative, he retrieved his sword out from Cong Buqi’s shoulder and used another technique out of the Dugu Nine Swords. Stabbing his sword out with a backhand, he pointed the sword tip at Feng Buping’s belly button. It looked almost as if it was another death-defying move of Linghu Chong that would end up in common ruin, but the stab had a surprising position that his sword would have pierced the enemy’s belly before the enemy’s weapon would ever reach him. It would only be a split of a second difference in speed, but the end result would be dramatically different."