12 points is a lot. I saw a tweet that for Tottenham to get a "normal" 4th place point total of 72-74 points, they'd need to play at a title-winning pace the rest of the season.
Of course every year is different, but what they will need is to play at an elite level for the rest of the season, AND have Chelsea/Leicester (or even City yeah right) have a bit of a collapse. As impressed as I am with Chelsea, they are a young club. A few beatdowns in a row, and it could damage their spirit. Their defense hasn't been that good yet, so they are my choice for the best candidate.
Even so, seems like a very tall task.