Not getting tickets from Bangalore to Pune/Mumbai as it falls under RLWL. No Worries.
For Pune going people, Book from Salem Jn to Kalyan Jn and change boarding point to Bangalore City Jn , you will surely get available seats in any of the class as it falls in GNWL. However Salem to Pune falls under PQWL.
For Mumbai going people, Book from Salem Jn itself, Seats are available easily.