If you're traveling to PRR on Tuesday and Friday, prefer availing this train till ASN and then continuing your journey by 13512. 13512 might depart late by 15 mins. due to freight traffic but be assured of flat 10:30 arrival at PRR mainly cause of slacks. Overall, your journey time will reduce by ~1.5 hrs against the traditional lengthy SER route followed by 12883.
If you're going to ADRA or on non-13512 days to PRR, take 68055 the only option available.