Individual sat scores or Composite sat Score?

Do colleges care more about individual scores or composite score? With the Jan 2016 and Nov 2015 sat, I got a 2170 super score (770m 770w 630r) but my reading score is like either not in range or at the lowest range possible for top 25 schools and my writing and math are in the 75th percentile for some. Should I study and take the act to be safer? I’m currently a junior and my dream school is Cornell.

I would recommend all students try both the SAT and ACT. Some people just do better on one over the other.