Bangalore property negotiation — what actually works?

Ulsoor Lake — been looking at Prestige Group 2BHKs, around ₹1.4 Cr. I'm told negotiation is tough, but I heard some folks manage. What actual tactics worked for you to get a better price? Any specific hacks or points you brought up? Also, how much can one realistically expect to save on the base price in Bangalore? Trying to avoid rookie mistakes!