Don’t discount a high GPA. My friend is a 4.0 164 non URM going to UPenn. In a cycle of high LSAT scores, high GPAs were a hot commodity this cycle and likely to be next as well.
Doesn't Columbia have a rep for placing lots of people into Big Law? I personally would keep working on the LSAT, bank your 170 and look around. With that score, your GPA, and URM, you might just score one of the Top 3. Good Luck.
With your stats and URM status, I think it would be a mistake to ED. I wouldn't rule out HYS or others in the T14 with $$$. Just make sure you have superb essays and LOR.