There might be a rather complex system with traps, observers, and so on; you need to have a good understanding of all of it. And the army of Sun Elves should take control of certain points in the city, just in case there are additional exits from the lair, meaning you need to cover everything at once and do it effectively.
There's also a funny thing about the analgesic they gave us. It probably slows down the disease, yes, but it's not a fact that it doesn't do this for a while, and then, on the contrary, speeds it up, depriving us of our last chances... But that's okay, it's too complicated. Although the fruit thing also seemed too complicated, but now it would definitely be too much, right? )
Added 3 minutes later
In short, Ment, if you want to survive, it's better to help the Fog. Because I can confidently say that our chances of success are minimal, even if we don't follow your plan.