Heat over medium and cook the chicken, undisturbed, until the skin is very crisp and deeply golden brown and releases from the pan (an indication that the skin is brown and crackly), 13–16 minutes. You have permission to rotate the pan (but not the chicken) from time to time to encourage all thighs to get equal love from the burner. And just like starting fish skin side down in a room temp pan guarantees crackly, bronzed skin, doing the same with chicken renders the fat slowly—and that means even browning and the crispiest skin imaginable.