Yes. To give an example, Aragorn can kill only a few units at a time with his blade master ability, so you can take the properties of that weapon. Here's what the weapon looks like for reference:
if you look at the number in the damage nugget you'll see it's set at 14. So you can use this as reference.
Go to the CAH weapon (Weapon CreateAHeroBasicMeleeWeapon) and simply edit the damage nugget as well as the other nugget to a numer similar to that, like this:
DamageNugget // A basic Nugget that just does damage
Damage = CREATE_A_HERO_DAMAGE
Radius = 14.0
DelayTime = 0
DamageType = HERO
DamageFXType = SWORD_SLASH
DeathType = NORMAL
End
MetaImpactNugget
ShockWaveAmount = 20.0
ShockWaveRadius = 20.0
ShockWaveTaperOff = 1.0
ShockWaveArc = 45
ShockWaveZMult = 1.20
End
just try different numbers and find something you like.