Conquest city

Conquest cities should be able attack and defend as well. Then you'll need hoplites and chariots and trirremes, because they can attack and defend.
When you get more than 7 cities you can make Cyclops and Hydras to escort your CS.
Use these cities to conquest, not to attack. Remember that mix units are very expensive.

Best islands:
+ wood and regular silver or +silver and regular wood

Building priorities

Senate 24, in this level you can pick the special constructions;

Academy 28, to unlock conquest;

Farm Max, upgrade farm always, your army power is determined mainly by your farm level; Warehouse 20, to stock resources for conquest, battering ram...;

Market 10, to send resources to other cities;

Barracks 25, to build your army faster(use population growth from Hera, you can build your nuke in 2 days, if you have the resources);

Harbor 25, to build your Trirremes;

Temple 10-15;

Cave 10, to espionage and prevent espionage;

Wall 0;

Resources level 30 or higher;

Special building: Thermal Baths and Tower/Divine Statue(temple 12), more population and more defense or more favour.
As your CS is slower than transport boats, you don't need FTS, but bunks is needed.

Academy priorities

Don’t research everything!

Hoplites;

City guard, when you’re attacked, use your militia, with this research you have more “population” defense;

Villagers Loyalty, good for your first three cities;

Ceramics, extra 2500 store of resources;

Architecture, you will economize many resources;

Trainer, to build your army faster;

Crane(good if you have the advisors and if you’re active);

Shipwright, by using this, you don’t have to upgrade your harbor to 15;

Colony Ships…;

Conscription, for cheaper army;

Bunks;

Plow, free farm level basically;
Trirremes, to escort the CS;

Phalanx, you need this(once researched your troops will attack with a boost of 10%, also your DLU support will be 10% stronger. If someone attack your city, you’ll defende better);

Mathematics, for cheaper ships;

Battering ram, for stronger Light ships(once researched your ships will attack with a boost of 10%, also your birremes supports will be 10% stronger. If someone attack your city, you’ll defende better);

Conquest,...

Cartography, your naval attacks are faster.