Instead of chandausi reversal, try this-
Bypass manikpur to reach CNB followed by LKO. Then reversal at LKO. Advantage of this option -
A bit short route length, not too much clumsy train going zig zag here & there. Other one, reversal would be at a major station which itself is important as well as helpful. Helpful in the sense, if some problem occurs or say loco failure at chandausi then train may get more delayed there than at LKO. And the last and biggest advantage is that- you will be avoiding majority...
more... portion of NCR Allahabad, so chances of "getting overtaken by" & further delay gets reduced.