Send Hog Rider after your opponent spends elixir, or as a counterpush after defending. It's so fast that your opponent has to respond right away. Add Ice Golem in front, or Ice Spirit, Earthquake or Fireball behind it, to get past the defense.
Tips
Track your opponent's Hog counter (a building, Tornado, Mini P.E.K.K.A) and send Hog when it's not in their hand.
Use Earthquake to weaken the defensive building so Hog connects.
Each Hog hit is small, but it adds up over the match; be patient.
Strengths
Fast, forcing a response every time.
Builds constant pressure in fast cycle decks.
Weaknesses
Defensive buildings and cheap swarms stop it easily.