You are overloading the Archer. You want him to master all elemental schools along with weapons (bow, melee weapon), armor skill and Perception. You will need bags of skill points for him to take him to some acceptable knowledge level.Archer is a warrior primarily. Most likely, you will want him to master his bow (GM, as high as possible). Archer's magic is rather his side line.
I recommend replacing the Monk by another Archer so that they can share the side line 
or a Mage, who takes care about elemental magic.
