Which Investment or Deposit Scheme gives the best profit rates

Can anyone from the banking sector or financial markets sector help me in guiding me that what are the best schemes for investing savings in deposit accounts or any other investment schemes that gives a good monthly profit rate. National Savings used to be a good option but its profit rates have gone down to ridiculously low levels in the last 3-4 months. Some of the bank websites show their deposit profit rates but many other banks don't show the exact rates on their websites.

Can anyone help in guiding which one will be the most profitable deposit/ investment scheme which can give monthly or quarterly profit returns. Thanks