Novice Active. The first thing an axe artist learns
is to strike with the short-end of the axe in
order to induce distracting pain before a
mightier blow. The short-end thrust deals
1D6 damage and stuns the enemy if the
character passes a [Accurate←Resolute]
test, meaning that the character gets to
make an immediate Free Attack.
First of all, this is my opinion and not an official answer.
In the case of Axe Artist, the capacity of dealing 1d6 damage and stunning the enemy is NOT an attack, it is an effect that is added to the normal attack. Therefore, I would rule it to use Accurate.
Iron Fist explicitly says that the change in Attribute is available when performing an attack, not any effect with a weapon.
Novice Passive. The character can fully utilize its
strength and therefore uses Strong instead
of Accurate then making a melee attack.