This deck is basically as far off meta as decks come. This deck was used by Shun in a Clash Royale League battle. Guards and zap are your main defensive cards against goblin barrel. You have an element of bridge spam with this deck because of the battle ram and dart goblin. With this deck you want to play fairly passively until you know what your opponent is running. The barbarian hut is a great pressure card beaucse it must be answered by your opponent. This deck is also legendary free and only have one epic card, the guards. So you should find it easy to upgrade if you find his deck suits your play style well.
Dart goblin is a great card he can be played at the bridge to get some small chip damage during the later stage of the game.
Ice golem is primarily used on defence in this deck, he can help take down swarm units or distract enemy units long enough for your towers to kill them. Use him to kite cards like pekka or princes into the opposite lane and away from your towers. You can also play him in front the the musketeers to help protect them.
Three musketeers are a card that you should play eithe rlater in the game or when you know your opponent is low on elixir. Barb hut can work well to bait out their fireball or posion which gives you an opening to play these three girls. I recommend splitting them in the back behind your king tower.
You can play this card centrally to help kite units into he middle but be aware this is a seven elixir card so you need to make sure you’re not going to leave yourself at an elixir disadvantage.
You can use this card along with the lone musketeer that you split. It applies great pressure to your opponent and can be tricky to deal with.
Early game you should play slow and wait for you opponent to make a mistake or over commit on defence. You need to try and find it what counters your opponent has you cards like the three musketeers and your battle ram. I wouldn’t open up the game with a barbarian hut unless your opponent play an elixir collector or another building.
Later game keep cycling those barbarian huts and stacking them up. If your opponent answers them with fireball or posion then you can go ahead and play your three musketeers split and then apply pressure both lanes and support them with the battle ram. If they don’t take the bait the. You will eventually stack up enough barbarians to overwhelm your opponent.