DrPraetorious, I have some new information for you that I hope helps with this initiative.
I tested Farsummons. Here is what I have found. If you choose a random creature to farsummon, a commander version of the unit and a standard version of the unit will appear in the province. So there is no way I have found to farsummon just a commander into a province, he will be accompanied by a standard unit of the same type.
Now here is the COOL part!
What makes farsummons unique seems to be tied into the unit you choose for the farsummon. For instance, if you choose monster #284 "Wolf" as your unit type in the damage field, the same rules apply to the farsummon that apply to the spell "Call of the Wild". I created a custom spell and used 284 as my damage type, the force was led by a werewolf! And on top of that, the fact that I did not choose a forest province for my farsummon reduced the effectiveness of the spell.
My guess is the other farsummons work the exact same way, with the unique commanders and effectiveness being tied to the monster chosen as the damage type for the spell.
Also, I tried effect 68 in combat to try to get random animals to spawn. I had no luck.
I hope this helps you some on your ambitious project if your still working on this.
Your spell modding guide has been extremely helpful to me and I appreciate your effort.
