What graphics settings I need to change to run on 244hz monitor with appropriate fps?

These standard tips can help resolve most Overwatch FPS drops:

If you’re on the latest build of Windows 10, let’s make sure Fullscreen Optimization is disabled:

  1. Navigate to the Overwatch install folder. (Usually in C:/Program Files (x86)/Overwatch)
  2. Right click Overwatch.exe and go to Properties.
  3. Go to the Compatibility tab.
  4. Check Disable Fullscreen Optimization and hit Apply.
  5. Do the same for OverwatchLauncher.exe.

Also here are advanced tips I have written in Overwatch’s Tech Support forum that maximize your FPS performance in the game.