With renewed optimism I'm planning to keep this thread updated with how many points are needed.
I'm simply taking the 3rd from bottom and projecting their points total based on current points/game then adding 1 point for our poor goal difference and 1 point as a safety margin. I'll update as new games are played by bottom three

Thus:

10/2/2019 - Required 45 which equates to 1.33 points/game (ie win 1 draw 1 lose 1 to end of season)