Chances for NUS/SMU for an international student.

Hi guys, I am a Filipino student who wants to study in Singapore. I graduated a local private school with the Filipino HIgh School Certificate (not IB or anything). I recently got admitted to SUTD and was told to attend the entrance exam for NTU. But I really want to study in NUS(FASS) /SMU(Business Management) /NTU, but I’m not sure if I can perform well in the exam.
My SAT scores are:
SAT1 - 670/770/700 (CR/MATH/WR)
SAT2 - MATH2 800, BIO 660, CHEM 650
My high school grades are very high (I graduated as the Salutatorian out of 500 students).
My CCAs are not very impressive (no sports or competition records). I just participated in volunteer works, club activities and school events. Please comment what you think about my situation. Thanks!

@ys04056 Did you get accepted to NTU or NUS ?