[X] Their personal bond. They did not know each other as well as Ling Qi might like, but… Sixiang was her friend and her muse, they had shouted at the Bloody Moon for her, and helped her through so much. [Ling Qi's arguments focus on their personal relationship and growing friendship. More effective rhetoric, but downplays Sixiang's problems and may only be a stopgap. Higher chance of Positive Outcome]
Several reasons why we should go for personal bond vote:
1) It "may only be a stopgap" ,it may not though, it doesn't necessary need to come to this next time. We can work just by keeping attention to Six and choosing our actions more carefully.
2) even if it fail being more than band aid, this choice will still give us time, and with time we can level up our bond with Six gaining insight in his/her mindset, especially now that we are learning Songseeker's Ceremony and Melodies of the Spirit Seekers. Next time we need to address with dilemma we will be ready, now is not the time.
3) we literally preventing Sixiang here from committing suicide. What is the point of deciphering his/her problems here if Six just dies next second. It's just wrong. First - prevent suicide, second - go for resolving a problem.
IMO going for bond is not the simple solution, it's the hard one with better chances not only for Six survival, but also for knowing what the problem really is. Whereas 'direct' goes for a throat of problem in one action but with lower chances, 'bond' vote gives us better chances but with condition that we will need to address problem later one way or another.
The thing is if you see your friend/family on verge of committing suicide you wouldn't go for philosophical debate, you would try to first prevent them from attempt especially if you know that it has higher chances of working. So our first response should be to go for 'bond' it's what every sane person would try to do for their family.