[Major Upgrade] Impartial Leader Selector

[thomaso827]

I think the simple fix is to remove the space for US Sgts from the leader selection for AAAD and put in an errata explaining that there are no US Sgts in the counter mix for that game. I know it affects more than one scenario but dont know how many yet. I need to pull it out and check. It seemed the simple thing to replace the missing Sgt with another LT. Stating that as errata rather than adjusting the leader selection tool seems the way to fix it.