when you know that your opponent playing LI i think it is the best choice, but you should play an "PF"(ID and rebounding less OD) on SF so when you try it with a common PG-like-SF the result wont be good.
PS: why it should work only for nt and div 1? Cause of the higher disparity of primary and secondary skills?
for my team...
from division 5 through division 2,
3-2 zone was often the best defense against look inside. except against monster inside teams, (with centers making more than my entire team, but with very bad guards) then man to man was best.
i would sometimes play 3-2 zone and *hope* the opponent played look inside.
& until i made the NBBA, i *hoped* that teams would play a 2-3 zone against me when i used look inside. in fact, I still sort of do.
2-3 zone hurts outside defense too much to be worth it. i remember even my guards with awful-inept JS were shooting over 50%. & 2-3 zone gives up way too many assists. and 3 point shots.
remember, you don't exactly have dominant players in lower divisions... the game is a lot different there.