Senior status BA Jur is not a recognised degree for admission, because it doesn't meet the 3 year min requirement.
I'd be upbeat about your chances of entering
NUS GLB or
SMU JD, but not really Harvard Columbia NYU JD. Bear in mind that you're competing with the entire pool of LSAT takers and top undergrad GPA scorers across America and the acceptance rates for HYSCCN (Harvard, Yale, Stanford, Columbia, Chicago, NYU) are very low.
Your CV must be very compelling, e.g. Singaporean who had graduated with top GPA from Ivy League undergrad and summa cum laude, won some scholarship or something along those lines. Even local American summas may not have a chance with HYSCCN. I'm sorry but
NTU is just not going to cut it.
That's not even touching on the issue of how well you score for the LSATs, which is about 50% weightage.
My advice is go try for
SMU or
NUS. A law degree is a law degree. If you do well and get qualified, try to land a reputable firm / big 4 firm and work your way up there to international firms.