This Giant Skelly Drill Bridge Spam deck is arguably the best deck in the game currently. It has a very solid defense but the offense is unstoppable. Defense and counter push is the name of the game with this deck. Ideally, you defend with the Giant skelly or Golden Knight and counter push with the drill, the magic archer, and most importantly the tornado. The magic archer, golden knight, and tornado combo are unstoppable if you use your ability at the right moment.
The drill is the main win condition, you usually want to wait to play one until you have counter-pushing units like the golden knight, giant skelly, or royal ghost.
The tornado is so important in this deck, use it to line up your magic archer or get your golden knight + ability to the tower.
In the early stages play reactively and counter push with the drill and other bridge spam units.
In the late stages of the game build up massive pushes with all your support units to make an unstoppable push.