Two main parts of this game are setting up your city and training your troops. When it comes to the last, it would perhaps seem that the higher the Tier of the unit, the better. And while this is somewhat true, the non-linear scaling of some of the attributes of the troops brings some nuance to the discussion.
This post is meant as an introduction and overview of the different troop types and Tiers, and help you come to a decision when it comes to picking which troops to spend your well-earned resources on. I know it a lot of information/thoughts/opinions, but bear with me…
Kingdoms of Middle Earth made easy 