Problem is that Larian gives every Encounter alot of Range Options for the lack of A.I.
Make a Zombie Encounter.
Single Zombie okay but when 2-3 Zombies reach a Partymember they are overwhelmed. So natural you may use a strategic retreat to kill Zombies in lesser troop strength because you can abuse the low speed. But in a typical Larian Encounter 2 Zombies teleport. 2 Zombies throw rocks and the Zombie is more or less same speed as humans. You Fight no Zombies, youi Fight 0815 Pixels.