Take the NDLS-GHY Sampark Kranti. It's available on Wednesdays, has a late night departure from Delhi and morning arrival at GHY. Though, like with most trains, it has serious paucity of SL coaches. But if anyone is looking in 3AE or 3A, then due to large nos of coaches and less number of stoppages, they are slightly easily available than couple of other trains [think Avadh Assam].