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Here's the save file; anyone who wants can try to take the Consulate on difficulty level 3 while keeping 2 angels and all marksmen. I was able to do it several times (I always skipped my own morale, and if griffins appeared in the early rounds, I interrupted the battle).
Here's a screenshot; I did it twice, and both times the griffins killed the archers.
Дипломатия - искусство говорить собаке "хорошая собачка" до тех пор пока не найдешь подходящую палку.