Best decks in clash

Here's some decks for 7 to 15 in clash Royale

Arena 7 

Arena 8 

Arena 9 

Arena 10

Arena 11 

Arena 12 

Arena 13

Arena 14 

Arena 15 

If you're looking to build your own deck I would recommend these categories. 

Wind condition, giant, hog rider, etc.

Building something like a cannon. 

Troops to support your main win condition.

Spell card.

And I'd probably say a swarm unit.

Now I'm not saying that's all That's just your deck after all you have to place them smart I won't be covering that I'd recommend this video on that.

 https://m.youtube.com/watch?v=GffPXrB5D9M&t=39s