My apologies if this has already been done.
The series can a bit difficult to follow because of the crossovers.
Let me know if I missed something.
Justice League Dark (2011) #1-6
I, Vampire #6
Justice League Dark (2011) #7
I, Vampire #7
Justice League Dark (2011) #8
I, Vampire #8
Justice League Dark (2011) #9-12, 0, 13
Justice League Dark (2011) Annual #1
Justice League Dark (2011) #14-21
Trinity of Sin: Pandora #1
Justice League (2011) #22
Justice League of America (2013) #6
Justice League Dark (2011) #22
Constantine (2013) #5
Trinity of Sin: Pandora #2
Trinity of Sin: Phantom Stranger #11
Justice League of America (2013) #7
Trinity of Sin: Pandora #3
Justice League Dark (2011) #23
Justice League (2011) #23
Justice League Dark (2011) #23.1, 23.2, 24, 25
Trinity of Sin: Phantom Stranger #14
Constantine (2013) #9
Trinity of Sin: Pandora #6
Justice League Dark (2011) #26
Trinity of Sin: Phantom Stranger #15
Constantine (2013) #10
Trinity of Sin: Pandora #7
Justice League Dark (2011) #27
Trinity of Sin: Phantom Stranger #16
Constantine (2013) #11
Trinity of Sin: Pandora #8
Justice League Dark (2011) #28
Trinity of Sin: Phantom Stranger #17
Constantine (2013) #12
Trinity of Sin: Pandora #9
Justice League Dark (2011) #29-34
Justice League Dark (2011) Future’s End #1
Justice League Dark (2011) #35
Justice League Dark (2011) Annual #2
Justice League Dark (2011) #36-40