The operation plan, although simple, wasn't something just anyone could execute. If Yanhuang Soul wanted to completely block off all exits, at least sixty or more top-tier personnel would be needed. Plus, they would have to be highly skilled to ensure minimal casualties when eliminating this stronghold.
A B-level assassin would require at least two B-level warriors to be confidently overpowered. By that logic, to annihilate the entire stronghold, one would need to deploy twice as many warriors.
However, for Xiaofan, their small team is more than enough.
Therefore, he wouldn't rashly confront Red Butterfly alone. He needs the help of others, and right now, Li San, Li Kuo, Han Shengjun, and the others are indeed his best allies. And they're very trustworthy partners too.