Hi...
Could you please imagine the one daily superfast train between Gorakhpur Jn to Mumbai LTT (via Ayodhya Faizabad Sultanpur Pratapgarh Prayagraj route)
Stops will be Basti, Mankapur, Ayodhya, Faizabad, Sultanpur, Pratapgarh, Prayag, Prayagraj, Jabalpur, Itarsi, Bhusaval, Manmad, Kalyan, Thane.
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Since in Atlas it's the sortest route between GKP to LTT but no trains are running on this route.
Please note complete the whole journey within 28 hrs.
There is big reason behind this
Since no daily trains connectivity is provided from Faizabad-Sultanpur-Pratapgarh to Mumbai.
That's why passengers of this route going to Lucknow (especially for Pushpak Express), Prayagraj (for Kashi, Godan Express), Varanasi (for Mahanagari, MUV LTT superfast Ratnagiri Superfast) for catch the daily mumbai trains to reach the Mumbai on any day.