
I've never fully testesdthe Lvl3 Lunar single hit vs Nunchuk UT but just on experience I'd say a full Nunchuck UT does more damage than one hit of the Lunar even if it is level 3.
Maybe Randomize was able to hit some single hit UT's with the chucks on the ogres by positioning himself to where they will do their jump attack and only connect the first hit of the nunchuck UT on them. Would be pretty hard to replicate that consistently but 55k endgame is only 22k in game so you'd only have to land it 4 or more times.