Even after you master a specific quest mission, you can still do that mission over and over. Doing this is a great way to earn extra gems and experience points, as well as a ton of gold if you don’t want to battle.(Cheap CA Favor points)
If you are getting sick of getting attacked and losing all of your gold, there are two ways to combat this. The first is to stop fighting and simply concentrate on quests and fighting monsters. The second one is to go to your keep and store large amounts of your money in the bank. If you do this, you will be protected from losing gold when you are attacked, and you immediately become a less attractive attack target.
Before you summon a monster to fight it, you have to have a certain amount of treasures from a collection. Go to the summon page, under the “more” tab at the bottom and look at what you need to find the treasures, and then ask your in-game friends for it. Send them gifts in order to help to convince people to send you gifts in exchange.(buy CA Favor points)
Before you begin a big monster battle or summon battle, you should be at a point where you are close to gaining a level. Your experience needed for a level should be equal to, or slightly less than, about 3x your stamina, because you’ll gain about 3 experience for every 1 stamina point spent on attacking the monster.
Of course, when you run out of stamina points, you can always go to the monster that you are fighting (this only applies to monsters at the bottom of the quests) and use the Sneak option to build up. These work similarly to a quest, except that (for the most part) they cost more energy but earn you more coins and experience points.