Speed it up between Balasore and kharagpur. Normally express trains with 0 halt cover it with 81-82 kmph speed.
Also its having very slow speed between Tatanagar-Bokaro-Koderma. Why ? Its rajdhani bro. Speed it up. By correcting this, you can easily increase the gap between the HWH rajdhani and this rajdhani. I think atleast by 40-45 min.