Does reducing a unit's Might (like with Ahri's effect or Stupefy) reduce both the damage needed to kill it and the damage it deals?

Ruling: Reducing a unit's Might reduces both the damage needed to kill the unit and the damage that unit deals.

Nuances:

• Combat damage does not reduce a unit's Might
• Units heal after combat, so there is no window to cast spells after combat but before healing occurs