A versatile deck might include a strong tank like Giant paired with support troops such as Musketeer and Baby Dragon.
Add cycle cards like Ice Spirit or Skeletons for quick rotations and cheap defense.
You also want a spell like Log or Fireball to deal with swarms and chip damage.
A building such as Cannon or Tesla can help you pull enemy units away from your towers.
This type of deck works well for both ladder and friendly battles because of its adaptability.
Practice your timing and learn when to push or defend to maximize its potential.