Buying far off options for margin benefit in option selling


If one is doing intraday option selling in BankNifty, there are 3 options which options to get margin benefit:

  1. buy current week expiry options daily and square daily
  2. buy current week expiry options in the starting of week and hold till weekly expiry
  3. buy monthly expiry (last week) options in the starting of month and hold till monthly expiry

Which of the above options do you think will be most cost efficient ?

Far otm weekly will be available cheap…and can be managed daily or week basis…This is going to cost brokerage, exchange transaction fee etc…
monthly otms are not going to be available that cheap but daily transaction and brokerage costs can be avoided that way…

Thanks for the reply.