Island Quests

Islands quests directly link to expansion, the more cities in different islands you have, the more quests you can have, then the more heroes you can recruit and upgrade.

They are divided in 6 types:

• Defend: You must defend yourself against an attack. You are the defender and the Islanders are the attacker.
• Attack:You must attack a specified force. You are the attacked and the Islanders are the defender.
• Wait:You must simply wait for the specified amount of time.
• Bad wait:You must simply wait for the specified amount of time, however for that time you will suffer a negative effect.
• Island Support:You must simply send the specified amount of troops as support.
• Send Resources:You must simply send the specified amount of resources.

Note: It's from grepolis wiki en.

The best quests are ranked in order decrescent:

1.Island support;
2.Wait;
3.Bad wait;
4.Send resources;

1. You can send troops quickly and hide your troops in the quest, a very useful quest;
2. You just need to wait, I would put this quest in a naval city;
3. Bad wait. Well, it depends if it's a negative effect in the resources, defense or attack. In the first case, you should use in a OLU city, because you can just farm  the resources. In the second, choose a city that isn't being attacked. In the last one, in birs or DLU city.
4. It becomes a good option, when you have more than 20 cities.

City Expansion 

Many people make the mistake of conquering many cities on the same island. Keep many cities in the same island is very good for defense, but this will slow down your development. Here's the why:

• There two forms to gain BP in battles, attacking and defending. If you have many cities in one island and the enemies disappeared, then you'll not receive BP in defense.
• As soon you get rid of closer enemies, the others will be too far from you, and you won't be able to take their cities.
• The more you expand, the more territory you can claim and the more enemies and targets you can have.

How many cities should I have per island?

It depends of the context, but in the general, two cities per island is good. You should have one OLU city in each island, then you can complete the quest 1.Island support and another city, OLU or other kind of  city, then you can choose 2.Wait or 3.Bad wait if it doesn't imply in a negative effect in your resources production.