What is the fastest way to level up your castle to level 10?

There are several things to help speed up growth. It's mostly about resources at that level.

* Gather aggressively

* maximize your resource production facilities

* Research the Rapid Production area. Do a Rapid Production on each resource at least once every day.

* If you are a farmer, maximize your Farmers Guild. Do its Bountiful Harvest as often as possible.

* Explore with the dragon as much as you can.

* Pay attention to the hourly challenges. Use speedups to hit as many of those as possible (at least chest 1, maybe chest 2) so that the development you want to do anyway is rewarded.

By the time the TIME to upgrade is noticeable, maximize your alliance hall. If your alliance is active, you will get several minutes taken off of each upgrade, research item, or healing of troops.