With only one Air Defense left, you can place your 10 Dragons practically anywhere on the map and get an easy 100% clear.

Use the three Lightning Spells on one of the Air Defense towers, destroying it (Lightning Spells do need to be level 3 or higher for this purpose).

If the enemy player has maxed out their Air Defense towers, all you have to do is build 3x Lightning Spells.Players may or may not need spells you will only need spells if you have level 1 Dragons and the enemy player has maxed out Air Defense towers.Taking down TH7 players with 10 Dragons is very easy.Town Hall 8 players can still be 3-star cleared, but not every TH8 player can be cleared.Town Hall 7 players are much easier to take down with a 10 Dragon army, as players get a third Air Defense upon hitting TH8.The spells and strategies you use depend on whether or not you are attacking a Town Hall 7 player.Since Dragons require a level 9 Barracks, it is in your best interest to level up all of your Barracks to level 9 shortly after hitting Town Hall 7 (upgrade each Barracks one at a time until all are level 9 so that you do not suffer from low production at any point).It is much easier to get excess Elixir to pump into Dragons as opposed to getting the 900+ DE required to build a 25+ Hog Rider army

Technically, a 25+ Hog Rider army will outperform 10 Dragons, but that is an enormous waste of Dark Elixir.If you want to take on mid-range TH8 players, it is useful to have a Dragon in the Clan Castle and to upgrade your Dragons to level 2.The best army composition at Town Hall 7 for War Battles is to use 10 Dragons.

Clash of clans dragon max level