Loco allotment will b based on Authorities. there is no compulsion in roster, tat WAP-7 will b given. any of the locos will b able to maintain the above sketched out TT.
Waltair doesn't home any WDP-4D, and moreover, a normal Diesel Loco is quite sufficient with such stops.
Freight based Locos won't even come to station unless they HQ orders, no WDG-4 is quite out of loop for now.