Enhance is a powerful and flexible spell. Boosting your allies’ Strength increases Toughness and melee damage, while Dexterity improves both attacks and defenses.
However, the description of the Enhance spell in the rulebook states,
If the caster increases Strength or Spirit, it does not increase Toughness or Shock.
I’m using the rulebook description for now, as it seems to be more consistent with other rules, but I want to make sure that is correct.