People argue over gas vs. charcoal grills. I use them both. At the same time.
While I am heating up the charcoal in a chimney starter, I put my cast-iron, charcoal mini grill inside my gas grill. I turn on the gas grill and let it heat the cast-iron grill up. That way, the coals don’t have to heat up the cast-iron. Hot and ready to go.