This wasn't wasted effort.
He had come up with Elementary Telekinesis and Elementary Annihilation in this way.
Experimenting like this now, he might be able to develop a powerful mental ability, or possibly turn a support technique into an attack strategy.
A mental ability might not do much as a physical attack, but it was a top-notch weapon against a person's inner psyche, and was far more powerful than firearms.
If Luke had Kilgrave's full ability to control both men and women, he would be able to live a carefree life even without the system.
That was the best choice for keeping a low profile and lurking behind the scenes.
Of course, the system was better. There was no need to scheme against others; just do your own thing and work hard to increase your experience and credit points.
