I disagree on rating Peace of Mind so low. Besides providing a good bonus for your primary stats (5 on lvl 20) and increase your Crit by a lot (11 Wits on lvl 20), which is a must for an archer, clears Charm and Terrified, the two more annoying status when the enemies inflict on you.
Also, Superconductor and Binding Radiance is good but their range are limited, so I rated them 3/5.
Restoration is the first healing spell you get, cost only 1AP to cast, heals a good amount and if you have Living Armor on the target, restore a little of MA. So, IMO is underrated.
Arrow storm is awesome: the damage is through the roof, hit a lot of enemies and doesn't hit your party (I think at least).
Laser Ray is one of my favorite spells of the game, it have one of highest (if not the highest) damage of non source spells, can hit multiple enemies without having to decrease the damage you done and is available very early (Driftwood).
To be fair, the usability and usefulness of a lot of the spells depends on your play style. Maybe, is easier to agree on the really underpowered ones, like Dimensional Bolt
