Can I prearrange my troops before battle?

Solution 1:

You can have some effect on it by changing the order of the units on your hero sheet. But the Tactics skill lets you place your units wherever you want before the battle starts. Taking this allows you to put your archers in a corner and surround them with melee units from the start.

Tactics is in the Realm tree. The upgraded version allows you to place guys closer to your opponent.

enter image description here