If Cresta and the others noticed his actions, then Aivern probably did it as well. Luke began to lose confidence that his mana clones could surprise him now… Still, it seemed that no matter what plans he came up with to strengthen himself, it would eventually reach him. In any case, he just need other back up plans just in case and then nothing would change.
"The power to see things happening far away… Clairvoyance… That wouldn't be enough to understand the mana clones," Luke thought. "In the other lives that he lived, Aivern could have learned mind-reading as well… That will make things difficult for me."
In any case, thinking about that was like digging an infinite hole without a rope to use it to escape. So, it was better to forget about that and just focus on getting stronger.