You VS Rank 2 Fang Yuan or You VS Rank 4 Fang Zheng
In this hypothetical scenario you are a Peak Rank 3 Gu Master of any mainstream path and have to choose who you are fighting in a life or death scenario. After you make your choice, your opponent has two weeks to prepare, they know only your name and your path, and during the preparation phase they cannot interact/harm you in any way.
They are also not allowed to increase their cultivation level, and they are both peak stage of their respective level. Everything else IS allowed.
So, who are you choosing? Fang Zheng or Fang Yuan (second life)?