The Guard was killed by sacrificing a snake in the center between the stumps as the first move, and then the terrain and a bit of luck played a role. But the bank is taken much easier. From the wait position, move through the Naga to the upper right, eliminate two groups of three until they are reduced to single units, and then in three moves, again through an attack on the Nagas, move to the lower left. The main thing is to time it so that they don't have any morale. These two battles took a total of more than an hour.