The option order will not have to be sold on the bid. Most platforms will allow you to send the order as a spread, buy stock and sell call. You will get a much better fill as it will be filled as a spread and need less edge for the MM then if you sell each one separately. I would suggest you start at "optimistic" price to be filled and then walk the order down. Start with a 1 lot until you have an idea on the price. You could also just sell March 20 45 put, this is synthetically the same as buying the stock and selling the call, and easier to put on.
In my experience, it depends on the market and underlying direction. When the market was moving fast and furious it was hard for me to know what was bid/ask since the quotes were changing so fast.
That is exactly what I'm talking about. I am creating the order as a spread. Most suggest to place the limit at the mid. But the best price should usually be to buy the combo at the bid or rather buy the spread at the bid. But you can't because it's not just a buy, it's a sell as well. Is that why mid is best?