My knee-jerk reaction is to go for the solo-delve option. To go down there and single-handedly take out Yan Renshu's entire operation. Just like the good old times at the Outer Sect.
But we are not outer disciples any longer. If we fail or get caught here, we can't just make a dashing escape and fly back to our house with Meizhen. Innocent lives are at stake here.
Ling Qi's cultivation has been about learning the strenght of cooperation to achieve tasks that no one could achieve alone, and this is the moment where that can shine through. So
[X] Withdraw, seek cooperation with the Ministry and the ruling family, go down as a group.
There has been much talk comparing this situation to either a planted bombs terrorist attack or small fires that are going to grow exponentially faster. I think that it's a mix of both. We have to take into account that a single Cyan menace is far more dangerous and destructive than a handful of Green ones.
Not only that. Even if the blooming seeds are week at first, they are going to have caretakers and guards, ranging from the second to the third realm, to protect them while they grow. Likely to sacrifice themselves to force a growth spurt if the need arises. In the case that there are a seed/bomb at each of the five locations, I don't see Ling Qi reaching and neutralizing all of them before they grow beyond the scope of what she is able to handle, even with all her abilities.
It's much safer an effective to simultaneously put down 5 mid-green terrorist seed/bombs than it is to stop 2 mid-yellow and 2 mid-green ones but allowing the last one to reach Cyan. Even more, if Ling Qi goes in alone is all the more likely for any of the Ith at any of the locations to pull off a self-sacrifice trick and retain her there just long enough until the other cells are ready. The way to avoid that is to crush them with numbers and overwhelming force.
So I think that regrouping is the right choice from a strategic point of view, but it's also beneficial from a political angle. This will prove the Ministries than we are a trudtworthy partner than they can actually collaborate and work with, instead of an arrogant newcomer who thinks she knows better and so will ditch them each time the chance to go solo presents itself.
And this the seat of power of a viscount family. If we help and collaborate with them to safe the city from a Shishigui attack, we could secure their support for future enterprises.
Then there is this bit
"You have done well, but with the target in place, your role has come to an end. Your gift will flower and activate the party favors. That girl will be removed from the board, ending the farce in the south, and the wretches of the Emerald Sea destabilized. Hail to the Twilight King, live in death, disciple."
The purpose of this operation wasn't just to kill Ling Qi, she is Yan Renshu's personal target, but to damage the credibility of our diplomatic effort with the White Sky. If we go solo, we would actually be helping Renshu with that part of the plan. However, we can also use that.
It's already known that the Ith tried and failed to ally with the White Sky, so now we can advertise how the underground enemy wants to sabotage our own alliance with them, which means they are afaid of it succeeding. That should grant us some margin with the more belligerent factions and gather support for our project.
In that line, we should suggest our Diao contact to employ the help of Li Suyin and Su Ling in case they perform a comb through other possibly targeted cities. Li Suyin has her underground access location talisman, and Su Ling's divination works better with underground related threats than more modern and imperial aligned methods. That would immensely improve both of their standing, as well as strengthen our allied Diao faction's claim of the place of old traditions in this new age.
Lastly, I don't want to kill Yan Renshu. I want to drag him all the way to the base of the throne at Xiangmen's top so our dear duchess can scourge him with some radiant
Truth and learn everything he knows before being reduced to mere ash.