Lucas can never cross Nathan because Nathan is not less than him in the mind game and pretending. After all he has been putting up his facade of being weak the whole time after his transfer to there.
Ch 31 An unexpected grand entry to the hyenas' den
I felt pity for that poor driver of Nathan the whole time as he got to undergo so much because he is the only one around him who knows what really this Nathan is.
Ch 29 The network jam that devoured the negativity
Lucas is just wasting his time by targeting Nathan. Because he is not just a simple foolish guy like Lucas is assuming Nathan to be. Nathan is way more clever and an onlooker than Lucas.