To be perfectly honest, Lex already knew what he preferred to do, but that did not stop him from his introspection. After all, important decisions should not be made in a rush. To start with, his intention from the get go for doing his best in the quest was to get a reward that would let him fix his cultivation. So it should be an easy choice to directly fix his cultivation technique.
But it simultaneously needed to be considered that his greatest reliance was the system. The whole reason this quest paid off was his system, and the more powerful his system was the greater use he could get out of it.For example the various formations he had available to protect the tavern were no longer as excellent as before. Sure, much of that had to do with authority as well, but if one claimed that the system's damaged status was not contributing then he would find it hard to believe.
