It differs according to the platform you're playing. If you're playing on a mobile device, you'll need to have a fairly high sensitivity than the PC user. While if you're playing on PC, it goes down to the way you hold your mouse. There are two types of ways people hold their mice, either it's arm or wrist. If you're a wrist user, you'll need a high sensitivity as you have a pretty small area of motion. But if you're a arm user, you'll have a larger area of motion so you can play on a pretty low sensitivity. The average DPI for people playing with wirst is 1600 DPI, while the average DPI for people playing with arm is 400-800 DPI.