- classes
  - soldier
    - weak melee damage attack
    - tankiness: high
    - spell: defensive
      - self-shield
      - armor buff
      - regen
  - berserker
    - strong melee damage attack
    - tankiness: medium
    - spell: melee dps or steroid
      - AS or AD steroid
      - no spell, but guinsoo effect
      - heavy single-target strike
  - black mage
    - weak ranged damage attack
    - tankiness: low
    - spell: powerful ranged dps
      - strong single-target nuke
      - weaker aoe damage
      - poison
  - white mage
    - melee or ranged healing ability
    - tankiness: low
    - spell: some kind of healing or support ability
      - single-target full heal
      - weaker aoe heal
      - auto-life
      - regen
      - stat buff
  - archer
    - strong ranged damage attack
    - tankiness: low
    - spell: some kind of dps or steroid
  - some kind of enemy debuffer? hexer?

- attributes
  - light
    - regen effect
  - dark
    - increased spell effect
  - fire
    - extra attack damage
  - water
    - increased mana regen
  - ice
    - increased armor
  - wind
    - increased attack range

- patterns:
  - frontline (N berserkers/soldiers in a row)
    - x + N*y bonus armor for the units
  - yin and yang (light and dark attributes in horizontally mirrored positions)
    - +50% spell effect
  - holy trinity (3 white mages in a group)
    - +100% healing power
  - circle of life (all 6 attributes in a circle)
    - all units in the circle get all attribute bonuses