Start a Mythic+ run and type /mp in or outside of the dungeon which will return a string that you copy and use for google sheets or excel. If the run is bricked, type /mp to see a window with info, showing "Bricked" as the bonus. If you complete the run, it will show the upgrade level instead. This works with a Google Sheets script to format the info when pasted into column A. The script is optional and just improves the appearance. Check it out on GitHub.
String is following: DATE DUNGEON KEYLEVEL TIME AFFIXE BONUS TANK HEALER DPS DPS DPS
For players this is being put in the string: name, realm, class.
So a tank would look like this - Tankman-TankRealm, Deathknight