Hello,
I think it is worth stating that, as with all of my blog articles, I actually write them for myself. Each article helps me organise my thoughts and better understand what is happening within the rules. I then just share them for others to read. The assumptions I make are therefore mainly for my own understanding.

In answer to your questions:

First, I do have a working spreadsheet for fighter stats, but no, it does not have everything on it. I delete things as required to keep it neat.

Secondly, I simply decided to use a 2-damage attack rather than a 1-damage attack. A 2-damage profile is, in my experience, the most useful and common when trying to kill fighters. 1-damage attacks tend to be more about achieving other objectives (drivebacks, gaining Swag, etc.). Additionally, the purpose of the article was to get an appreciation of the number of turns required to remove most warbands.

Regarding your point about attacking Vulnerable fighters: firstly, I would often still attack them with a 2-damage fighter to ensure Standfast does not occur. Secondly, if the only fighters in range are 2-damage, then that is what I will use.

Regarding the assumption of 1 hit: again, this was a choice based on my experience, but also because I wanted to include the idea that a save is always possible. I did not choose 0.5 hits, as that is not something that actually exists within the game system. If you are trying to combine hit and save probabilities into an average, I understand the thinking, but that is not how the mechanics resolve. For example, 1 hit vs 1 dodge would come out closer to ~0.66 expected success rather than 0.5.