It doesn't make much difference potential wise.
If you already have let's say 200% luk.. it's better to just pump up luk then str or dex.
Damage wise Luk, Str, and dex all give the exact same dmg boost so there isn't a difference from high str as compared to high luk.
It's a bit cheaper in some cases to do all 3 though...
50% all stat to raise all 3 equally gives the same dmg boost as having 150% for a single stat (And 50% all stat is cheaper then 150% luk/str/dex)