Manage Margins in Options writing

Since we do not have the facility of basket orders currently in zerodha - how do we get the benefit of margins for hedged orders wrt options selling? Do we first buy the hedged positions and then sell to get the margin benefit?
And do we use GTT for both orders instead of manual orders to beat volatility?

You can do this.

If you are worried about slippages, you can use Limit order instead of market order.