Well if the clause that I mentioned is in the will, then kidnapping makes much more sense...perhaps he meant to torture him to death? or Arnav has some clause about dying under suspicious terms in the will as well that might harm Shaym's plan to get the property..
The whole will will was shown to us in plain sight!! no clause whatsoever found.. So i think shyam might kidnap ASR to torture him to death or to write a new will and get it signed by him..