AC DD trains were introduced with an aim of carrying more passengers on saturated routes than what the single single deck trains can carry.
JP DD with 13 CC & 1EC (2ECs during peak season) have maximum coaches (& hence Paxs). With a decent avg. speed of 67kmph in spite of single line patch, This is the most successful acDD train.
Not far behind is BCT-ADI acDD which is also a success.
Rest...
more... of the other DDs are mediocre and not so successful due poor patronage & speed