Harmony - Troop Symmetry

however, this skill is too dependent on the enemy, or rather, on their faction, and with a large variety of factions, the skill is almost impossible to implement. Furthermore, for example, the "Open Gate" skill does not depend on the presence or absence of a town, but the "Avenger" skill cannot be implemented without it (although this applies not only to the "Avenger" skill, but to others as well).
Suggest ways to eliminate this drawback (I'm talking about the dependence on the enemy faction, or rather, on the number of factions participating in battles, because with a number of 4 or more, this skill cannot be implemented in all battles, and it is only implemented in those battles).