Dont rush building army at the beginning of the server. you need huge amount of troops to raid oases, only focus on storages and crannies and resource fields and try to rush takeing atleast 1 15 crops 150% since no one will attack with catapults at the start.
Unless you are experienced and playing with Teuton. Be sure to have at least one or two level 10 crannies when you finish beginners protection as this is your defence against raiders.
Build as many crannies as you need to avoid raiders plundering your resources while you are offline. This strategy will keep you safe until the catapults arrive at least!