Should I retake GRE?

[BhavyaShe]

GRE: 319 (Q: 165, V: 154) AWA: not received yet

CS, BTech with 85.5% (91% topper)

1 national paper in networks

1 internship with Microsoft R&D; 1 training and project in IOT

8 months of work ex with Microsoft 

Zonal topper in 10th: 10 CGPA; School topper in 12th: 94%

Three merit scholarships; Some extracurricular activities 

Mark the following uni as safe, mod and ambi. Add new if required:

1. University of Waterloo: Safe
2. Uni of Cal, San Diego: Safe
3. Uni of Toronto, Downtown: Mod
4. Columbia Uni: Mod
5. Cornell University, ME: Mod
6. U Penn: Ambi
7. UTA, MIS: Ambi
8. CMU, MSIM: Ambi