The enemy creation guidelines in Draw Steel: Monsters say: "A monster’s free strike damage is equal to the damage calculated for a tier 1 outcome for an ability."

Is this actually true in most cases, though? As far as I can see, horde/platoon/elite/leader/solo monsters almost always deal more damage with a tier 1 result than with a free strike. Only minions seem to match the guideline of "A monster’s free strike damage is equal to the damage calculated for a tier 1 outcome for an ability."

How is free strike damage actually supposed to be calculated for horde/platoon/elite/leader/solo monsters, then?