I'm not sure how high the luck factor goes on TM, but certainly for LATO i'm at 9400 luck with pure strength (lvl 150) in my best gear.
For LATO i have 666 lps and luck = 9417 max
373 trading, 129 shooting, 469 stamina
-with this i know if i get my trading up to 400 with the other stats the same i can achieve 9500 luck.
For travelling merchant i have 950 lps and luck = 8191 max
375 trading, 180 setting traps, 414 toughness
sorry I couldn't be of more help