While i dont disagree that the backline mage primal weapons add effects should proc on spells theres no need for SE to sculpt a perfect weapon with the absolute most usefull stats for each class with the primal weapons. They arent the be all and end all of weapons. They should be making situational weapons before they make the weapon for all situations which is what the primal weapons are, some stats are particularly useless right now due to the shape of the game but that doesnt mean it will stay that way.