This is actually the approach i'm taking on my current playthrough. Early on, one of my Knights learned weapon, armor, power, speed and mind break. I then changed her job over to an archer around the time you run into Dorter trade city ( when you can actually start getting Bows! ).
The result is pretty awesome. I can use knight break abilities at long range. Power break is great to effectively take a monster out of battle. He'll still be there, but he'll be swinging at you for less than half the damage. The rate of success in hitting one of these breaks seems to be 42% - 55%, depending on you and the enemy's position. Sadly, concentrate doesn't improve the success, but i'll take ~50%.