As long as Noland Lee always has sufficient Energy Points on hand, it's as if he possesses "Omniscient".
As for what use "Omniscient" has.
Heh heh, that usage is huge.
Wizards have various magical means to detect crime scenes, which can easily find clues. But don't forget, wizard criminals, who are also wizards, will have anti-detection magic means, and even specifically target detection magic with sinister traps.
At this time, the non-magical "Omniscient" comes into play.
Since there is no energy fluctuation while launching and no casting features, "Omniscient" can find clues without anyone knowing or detecting it. This is far more convenient, safe, and reliable than using detection magic.
According to statistics, in the Law Enforcement Wizard Credit Point Rankings, the top 10 enforcement wizards all have "Omniscient". They are also members of the "Scholars' Association," a magic association that invented the well-known universal-class spell "Appraisal Technique".