It would be better if existing rake of DD is split into 2, one should run from SC-BZA-SC and another one from VSKP-BZA-VSKP. Timing should be something like SC 07:00 BZA 12:00 and BZA 14:00 SC 19:00, VSKP 07:00 BZA 12:00 and BZA 14:00 VSKP 19:00. In this way we will get SC - VSKP / VSKP - SC AC ICE as well.