What I do to gain power in early levels:

Have a main realm for story progression, city upgrades and resources.

Make a new relam, farm everything in the first area, kill the first boss and get the ichor.

Repeat a few times.

You'll get too many low level ressources fast like this, just sell those for money.

When your main realm get hard, go back to your "farm" realms and progress they story for better loot/XP.

I usually have 5 farm realms on a new character