If you are certain about your plan to travel by this train, best option would be to travel from Pune to LTT.
This is worth taking trouble then remaining in a 'limbo' .
Cost wise also you will spend money to reach the Pune Stn, then why not spend a little more (Fare upto Dadar and Dadar to LTT) and buy a peaceful, assured and 'masti' journey:)