Ankle Holsters offer one unique advantage for defensive firearms carry, as they place your defensive tool in a location that most people do not think to look. Danny Pieratti prefers ankle carry and demonstrates proper presentation from that position in this video.
Student alert! If your defensive firearms instructor is not giving you an integrated system of firearm manipulation techniques but rather a set of unconnected techniques that don't integrate well together, don't reinforce each other, and don't contribute to your efficiency by being consistent with one another, you need to challenge those techniques.
Rob Pincus discusses zeroing your home defense long gun optic and why the normal rules of The Plausibility Principle are trumped by the efficiency of zeroing your rifle for much further distances than you would most likely be using it.