He has no chance on Luka. Randle is a bruiser and believe it or not can guard guys much bigger than him (sabonis, siakam, sengun for example). More physical the guy is the better Randle plays on defense. Luka’s entire game is based on deceleration and hesitations built into every move.

Anytime Randle is switched on him it’s over. But like any other minus defender you can pre-rotate to avoid those matchups as much as possible. Randle has good enough dbbiq to call those out ahead of time and finish the possession with the rebound.