The Hog Rider should be placed behind the Valkyrie to give it a boost so that it stays in front of the Hog Rider, protecting it.
A Hog Rider combined with a Goblin Barrel can be awkward for the opponent to defend against. Timing it so that the Hog Rider is tanking the tower shots for the Goblins is the most effective way to deal damage. However, a Barbarian Barrel can shut this down with minimal Tower damage for a positive Elixir trade, as long as the Goblin Barrel was placed directly on the Tower.
Pairing the Hog Rider with the Balloon can deal devastating damage. If executed properly, the Hog Rider will act as a tank while the Balloon threatens to deal massive damage. The Hog Rider can also destroy any buildings attempting to slow down the combo. However, this combo is very vulnerable to swarms and anti-air cards as neither of the troops target anything but buildings. Additionally, they are easy to separate, due to the disparity in move speeds. Alternatively, the Hog Rider and the Balloon can be played in different lanes to spread the opponent's defenses thin. However, a building or Tornado can bring them back together for an easier defense.
The Hog Rider can be paired with the Lumberjack as both a swarm bait and damage combo. It is a very fast combo with an extremely high damage output potential, so the enemy will likely try to counter it with a swarm. If this happens, use a spell like Arrows to render the opponent defenseless. If they manage to defeat the Lumberjack, the dropped Rage will make the Hog Rider even more dangerous than it normally is.
A fast and deadly combination is the Hog Rider and Mini P.E.K.K.A. combo. Both units are fast but the Mini P.E.K.K.A. does much more damage and does not attack only buildings so the Mini P.E.K.K.A. can deal with troops like the Executioner and Musketeer. However, this combo can be defeated with swarms like Skeleton Army, which will defeat both of them since neither of them can deal area damage. They are also unable to target air troops, so the Minion Horde can stop this easily.
A risky play is to deploy the Hog Rider at the bridge as soon as the match starts. If the opponent does not react fast enough, the Hog Rider will deal a significant amount of damage to the Princess Tower. This can also allow the player to quickly scout the opponent's deck if they happen to react to him fast enough