Ideas and suggestions.

I suggest adding a "Novice Set" to the game (Axe +2, Shield +2, Breastplate +1, Helmet +1) with a small but pleasant bonus. Examples of bonuses (as I see them): 1) +1 to speed, +2 attack, and +2 defense for all level 1 units - this complements the fact that it's a novice set and provides a boost to level 1 units (some variation across levels is possible). 2) Give an additional +1/+2 to all stats. 3) Similar to other sets, cast a single useful spell at the start that isn't available in other sets (e.g., Blessing, Joy, Luck, or Sorrow). This addition could be a good help at the beginning of the game and also add possibilities for simplifying second-front pushes in the later stages, making the game more dynamic when collecting this set.