- Pests because they are a great source of dark quanta and are also able to deny your opponent quanta. Upgrading makes them more likely to survive certain damaging spells if they aren't already burrowed. Plus, they can survive longer if the opponent has damaging shields.
- Steal is a great way to turn a match around. For example, stealing Sanctuaries allows your pests to use their passive, stealing pillars/pendulums early in a match if the opponent didn't draw many, stealing shields etc.
- Vampires are a nice source of damage/life point source, damaging the opponent whilst also healing for the amount of damage the vampire did.