Dragon raid strategy.....How to train your dragon...
I would personally recommend to use this strategy if the air defenses are close to the edge and if you have rage spells and heal spells.
1) Rage spells increases the speed of your dragon and also the damage it inflicts upon your target. So if there are heavy armoured buildings like Town Halls, Dark Elixir, Gold/Elixir Storages and Clan Building, use the rage spell towards these direction to quickly plunder these obstacles so you can inflict onto the defences.
2) Group them up and attack on 1 direction - why? dragons inflict high damage and can quickly eliminate buildings when they are grouped together.
3) Avoid wizard towers that are embedded in the center, especially when you no longer posses a healing, or rage spell.
4) Since dragons have no preferred target, they will go to the nearest target. Timely releases towards an archer tower, or the air defenses are recommended target, as these are the only ones that will inflict damages towards your dragon.
5) All the best, go Scoprion!