Level 17: What units?

[Koki]

If you really like your lineup and it works... don't change it.

Go to Demonis, sneak around the "heaven" section and check out the shops.
Go to Ellinia, sneak around(Get a ship!) and check out the shops.

We can't really tell you what to get if we don't know what you have available.

Oh, and at this point you should start worrying about morale - i.e. exchanging Shamans for Hunters will mean you will have both Elf and Dwarf unit in your army, which means trouble.