This deck is designed to defend and control the match until you have an elixir advantage against your opponent. It can easily overwhelm if you don't over extend. It definitely Is an easy and powerful deck to use.
Sparky will be your crowd control and needs to be played behind the goblin giant and paired with a unit to defend it from swarm units. Pair her with the hunter or mega minion.
The goblin giant's role is to protect and tank for Sparky
The hunter will be air and swarm defense for sparky and goblin giant
Defend and control the match using the hunter, snowball, guards and mega minion. Once you clear and stop your opponent prepare to play the goblin giant and sparky combo under the condition that you have some elixir(3-6) to defend the opposite lane or to stop your opponent from stopping the push. Since the usual counters require heavy spells, spacing the troops is important in order to avoid giving the opponent an elixir advantage.
In 2x time you can be more aggressive with your push and bait out the opponents spells if you have determined what they are playing. Don't overextend but definitely use the combo of sparky goblin giant hunter whenever you can.