Carpe Regnum Progress Update - Units & Advancement

Hello to the people reading this, who are all extraordinarily intelligent and attractive!

Over the last few days, I've been brainstorming how to approach adding in the myriad of unit types I want. Here is the plan:

There will be a small set of standard units that the typical faction can recruit: spearman, maceman, archer, cavalry, and mage. (The first two may be rolled into one.) Each of these has a branching upgrade tree going from Tier 1 to Tier 4. For example:

• Archer
  • Bowman (shoots twice per round)
    
    • Elite Bowman (damage focus)
      
      • Champion Bowman
    • Ranger (more versatile and gains additional benefits in forests)
      
      • Champion Ranger
  • Crossbowman (shoots once per round, somewhat better in melee)
    
    • Elite Crossbowman
      • Champion Crossbowman
      • Musketeer (shoots once in two rounds)

Assuming you weren't utterly engrossed by that advancement list, you might remember I mentioned that only typical factions work like this. Some factions will be commoners or outlaws. Such factions recruit from a unique list of units with their own advancements. (The brigand is an upgrade from the outlaw bandit unit.) I'm torn on whether to include elf and dwarf factions in the forests and mountains respectively.

Certain events will unlock additional upgrades; upgrading a mage to a necromancer, for instance, will require somehow finding the secrets of that vile magic. This might be a useful place to bring in elves and dwarves: perhaps the dwarves know the secrets of blackpowder, which allows elite crossbowmen to advance to musketeers, so that a player who wants to use muskets needs to either conquer or befriend a dwarven faction.

Developing provinces and constructing buildings is on the back-burner for now. Once I've adding a good selection of units and advancements, finished up the UI, drawn some high quality pixel art, and added a few subsystems (e.g. heroes, rebellions), I'll release a playable draft. That should take a couple weeks.

Comments appreciated :)      please I beg of you