User blog comment:Kandoo12/Help me make my deck better!/@comment-24785955-20160319030644

There are two major factors in making a deck.
 * 1) Offense
 * 2) Defense

Naturally, more cards go towards offense and less to defense but cards such as spawners can serve both. Experiment new cards and see what cards go in sync with them which is a purpose of the training camp.

Also, the opponent's battle deck must be taken into account to actually know the weakness of a deck. For example, a spawner deck can be easily countered by key cards such as lightning and arrows. All decks have their weaknesses and a "perfect" deck is near impossible to achieve.