Having a hard time finding the right sensitivity coming from Destiny 2

Hi! I am aware that Destiny 2 and Overwatch have the same hip-fire sensitivity, but I'm having a problem with finding the correct sensitivity for ADS. In Destiny 2 you almost always want to be aiming down sights but I can't figure out how to get that sensitivity into Kovaaks. In Destiny, my sensitivity is 11 with the ADS speed being .9; thank you for your help! :)