Air brakes
Talking about this, speedbrakes can be used either to decel faster or to increase the descent rate. As can the flaps. As mentioned, flaps are not to be used as brakes. However, do you prefer to decel to flap manouvre speed, pull flaps, and have the increased rate, or do you pull the speedbrake? Personally i use both, depending on the situation with a preference for the former as it is smoother for pax.