You could pretty easily get to Kurla via Bandra and board a train for Panvel right there on the harbor line as well. This will prove a lot quicker. ;-)
And if you're lucky, you'll get a Vashi bound local (VA); much less crowded! ;o)
yeah i got it then i'll cancel my plan for khar on that day i'll be at home and catch a train from kurla to mankhurd.