The combination of spells that you bring to war with your troops is very important.
It can greatly help in the success of the attack.
Combination of spells that are used depends on the troops that you are going to bring to war.
If you are in a town hall level 8 and is going to war with dragons, it is best to use three lightning spells and one poison spell from the dark spell factory.
The three lightning spell is used to kill one air defense and the poison spell is used to kill or weaken the troops marching from the enemy’s clan castle.
In town hall 9, your spell factories can have a maximum of 9 housing space enabling you to bring more spells to war.
If you are using a dragon attack in town hall 9, bring three lightning spell, one rage spell and one poison spell.
The additional rage spell is used to make your dragons go faster and stronger.
Drop the rage spell when the dragon comes close enough to the air defenses.
In ground attacks using hog riders, it is best to use heal spells and one poison spell.
The heal spell is ideal to help keep your hog riders alive throughout the battle.
In town halls level 9 and 10, the most common attack is the ground attack using golems, PEKKA, wizards and wall breakers.
In this kind of attacks, bring 4 earthquake spell from your dark spell factory combined with one heal spell and the remaining should be rage spells.
Four earthquake spells can destroy even the maximum walls so it is better to use them rather than the jump spell.
Drop the heal spell to where most of your troops are concentrated.
The same applies to that of your rage spell.