Create 3 new MK accounts (need 3 PANs) and add 1k first (0 charges for 1k per month) and then load 5k (For new user, 75 back). You would've added 18k at Rs. 225 charges. i.e., 1.25%. Obviously, this will work only once and if it's a one time thing, this method has the lowest charges
If you want a recurring method - With a single MK account, you can rotate 16k per month. Add 1k first @0 charges and 15k next with century code, so 50 back. Net charges here would be 2.5%. This is the best you can get