The only thing that changed the expected outcome was the plan that had been put in place to deal with Mason, as the assigned roles to deal with it were chosen for the sake of carrying out that plan and not to use the most powerful among them.
Sometimes tactics and roles were just as important or could be more important than the strength of each individual who could be used to go up against such a Spirit or Evil Spirit.
The power they had would be more effective for causing more damage, but they would expose themselves to more danger as a result of having no spells or techniques that could be used to fill the required role.
The plan was put together to reduce the risk to their lives and to ensure that everything would end without anything unexpected happening.
At least two Balancers who could use a ranged attack were needed to ensure that everything went according to plan, so Ash had to fill in the missing role.
