The best Vi tier is 4-star with a 87.50% win rate. This tier is upgraded to 0.03% of the time and has won 7 matches out of 8 games.

The most common Vi tier is 2-star with a 73.38% upgrade rate. This means players most frequently play Vi at this star level, achieving a 42.97% win rate.

Vi at 3-star has a 56.89% win rate and is upgraded 15.24% of the time. Yes, upgrading to 3-star significantly improves win rate by 13.92%.

Vi at 1-star has a 26.32% win rate and appears in 11.35% of games. Vi is played at 1-star but generally performs better when upgraded.

The win rate progression for Vi is: 1-star: 26.32%, 2-star: 42.97%, 3-star: 56.89%, 4-star: 87.50%. Upgrading Vi shows clear performance improvements.