lets say the attacker and defender tie in a fist fight The rules say the attacker must have something that changes the 0 to + like a weapon. Does boosted strength that makes your fist attack a weapon attack count?
I'm not sure what you mean by "The rules say the attacker must have something that changes the 0 to + like a weapon."
Weapons do add stress to successful attacks, but if there are no weapons, the rules recommend changing a tied attack to a fragile aspect.
Strength powers do add a weapon value to Fists attacks.