Upgrading is the most important thing in Clash of Clans. It keeps your base up to date and can protect the base from intruders. It also helps you produce your resources faster.
Defenses, traps, and walls should always be upgraded first. This includes the Clan Castle. This way your base will be well built and protected, able to clear any intruders from getting to your resources and Town Hall.
Army buildings are to be upgraded second. This way you can take revenge with an even powerful army. This will also help with farming to accumulate more resources. Any heroes should be upgraded first or last, not in the middle.
Any resource related buildings should be upgraded third. Any storages should be upgraded the first of all resource buildings. Then…
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