Found this which was put together by a Swindon supporter when they were pushing for promotion from League 1. It's based on stats from 8 League 1 seasons so not a large sample but probably not far off probable outcomes. I've added CAFC stats for the year at end.
The Champions
Highest Points Total: 100
Lowest Points Total: 82
Average Points Total: 92.6
Guaranteed Points Total: 92
Automatic Promotion
Highest Points Total: 91
Lowest Points Total: 79
Average Points Total: 85
Guaranteed Points Total: 88
Third Place
Highest Points Total: 87
Lowest Points Total: 76
Average Points Total: 82
Guaranteed Points Total: 85
Fourth Place
Highest Points Total: 84
Lowest Points Total: 73
Average Points Total: 79.1
Guaranteed Points Total: 83
Fifth Place
Highest Points Total: 82
Lowest Points Total: 72
Average Points Total: 76.7
Guaranteed Points Total: 82
Sixth Place
Highest Points Total: 81
Lowest Points Total: 71
Average Points Total: 75.1
Guaranteed Points Total: 81
To Avoid Relegation
Guaranteed Points Total: 52
CAFC
22 games to go, max 66 points available
Currently on 54 points
Therefore 38 additional points required to win the league
13 wins (39 points) to win the league
Average of 1.77 points per game to win the league
Current average points per game is 2.25
Based on current average, on target for 104 points or 50 additional points
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Comments
i.e. No one has got 88 and finished third.
Charlton finished 4th under Parky with 84 points.