Please stop over reacting since outset of this blog you are trying to invite blind heed of peoples.
Magadh is a sibling of Mahananda toofaan and seemanchal types train why are you dreaming and seeing it as a competitor of Patna Rajdhani and Sealdah Duranto ? Its just a modest type of superfast habitual of getting trampled within ECR & NCR so why are you weeping and blubbering MAGADH MAGADH it is getting what this train deserves.
Slip coach should can be added to magadh from islampur and its the headache of ECR...
more... and not a big deal ECR can allot it few coaches from its deck.
Secondly you can find some WDM 2 of MGS or SPJ lying at Patna they can be used for this purpose.
I think you are a neophyte railfan and sounding just like a chatter box which knows nothing,its not the issue of DNR because DNR is a zonal HQ and providing a loco is the matter of ECR MGS not ECR DNR.
without FOG Magadh is operated between ISLAMPUR & PATNA and the avg delay is 4-5 hours.
Well which train arrives PNBE/NDLS ontime departing patna/ndls except rajdhani ?