I am unable to recall if Durgiana is via SLN or not ?
but 13167/68 has multiple halts between BSB - PBH - LKO.
further, Durgiana and KOAA - AGC originate same time @ KOAA and has same slot between KOAA - DHN. but TT is different afterwards.
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but your suggestion is good. TT can b re-worked upon.
however, extension to Kota after AGC wudnt b easy.