Hoo, okay! We're nearly at breakthrough stage guys! And we made Sun turtle up, so breaking through soonish is a good idea.
Hmm, still no minor or major action to find the 4th Argent art despite how very much the thread and Ling Qi wants it. Maybe levelling 3 Argent arts to level 3 will lead the way to the fourth? Hell, maybe you have to cap 3 Argent arts before the 4th one will reveal itself to you, as a kind of test of devotion. But whatever, we definitely don't have time for that. Now, let's look at the minors...
Ok, these are the few I think are important to grab before breakthrough
[] Zhengui's pyre had begun to dim, shrinking no matter how much fuel you add. You should be there when he emerges
[] Work to unlock the Puzzle Box
[] You've learned what you can from simply observing Cai Renxiang. Ask her about the capital and about herself
These 3 are the most important, for personal development and for our cultivation. Zhengui and the Puzzle Box are self-explanatory of course. Zhengui is our baby bro, and puzzle box might have something that helps our breakthrough, or the 4th Argent art, or who knows what.
Cai is probably a more controversial choice given how many options we've already been spending on her, but... look, this is it, we're close to breakthrough. We've been doing all her actions these past few weeks so that Ling Qi will get to know her better, get to be friends with her, and now, we have finally reached the stage of asking her about herself. We can finally start talking about at least mildly personal stuff instead of staying mostly professional with her. Also, we get to ask her about the capital where she'll probably be dragging us for spy work.
We only have another week or two at most to get to know Cai as well as possible before we have to give her our answer. I know most of the thread is already fine enough with joining Cai with what we know of her currently, but I think it would be more in character, and more appropriate, for Ling Qi to only join Cai after they're properly friends. And while Ling Qi is definitely warming up to Cai, they're still not friends yet. Please, let's not abandon Cai minor when we're so close to breakthrough.
Apart from that, I think the Meizhen option is the next most important. She's too busy to train us this week, and I think this is the point we should definitely investigate. We don't want Meizhen slowing down her cultivation because she's too busy chasing Yan. She's our friend, he's our enemy, we should totally help her out now, or she might spend more weeks chasing him and maybe fall behind on cultivation and get beat by Liling.
As for the last option... either Su Ling of Xiulan. Maybe Su Ling minor, and Xiulan wolf mission major. Important to keep our social links strong.
Han Jian and Gu Tai aren't particularly important since we really don't have the action economy to be just socialising when we have other things to do. And Suyin is useful, but we're not finishing that research tree before breakthrough, and we saw her just this week, so she's not that urgent either.