And it would be really nice if I had some snazzy icons for these categories.
So, Unleash the Artists!
Categories in need of icons:
High Magic
Chromatic Orb: A random element bolt.
Mind over Mana: Buffs arcane resist and mana regen.
Arcane Defiance: Anti Silence.
Spellblaze: I think you can guess this one.

Distortion
Timewarp: Temporal nova.
Space Warp: Swap places talent.
Time Lash: Adds temporal damage to teleport and time manipulation spells.
Warp Master: Lowers cooldown on temporal/conveyance talents.
Illusion
Mind Spike: Mind damage single smite attack.
Charm: Dominates an enemy.
Prismatic Chaos: Light damage chain that inflicts confusion.
Phantasmal Mirror: Like Phantasmal Shield but works on ranged attacks.
Power
Yonk: Boosts spellpower for your next spell.
Force Balance: Boosts stun/knockback resistance.
Sever Magic: A dispel that also silences.
Shield Overload: Turns your damage shield into a nova.
Morph
Enfeeble: Weakens an enemy.
Vitalise: Boosts your physical stats and life.
Petrify: Turns enemies to stone.
Crumble: Shatters weapons and enemies.
Void
Disintegrate: Void damage beam.
Whispers from Beyond: Increases spellcrit but lowers mind save.
Frayed Edges: Allows the void to bleed through into an area, doing darkness damage, inflicting manaworms or lowering darkness resist.
Void Avatar: Resistance piercing sustain for Void damage.
Force
Force Punch: Physical knockback bolt.
(Shielding)
Rebound: Reflects projectiles and enemies.
(Aegis)
Restoration
(Arcane Reconstruction)
Lifebind: Increases max life, blight resistance and heal mod.
(Arcane Shield)
Purify: Regenerates life while removing magical buffs from enemies.
Elementalism
Endure Elements: Boosts elemental resistances.
Elemental Shield: Makes a shield that blocks elemental damage.
Elemental Battery: Gain mana when your Elemental Shield absorbs damage.
Dominate Elemental: Dominates an elemental.
Corrupted Elements
Flux: Single target Blight damage.
Blight Affinity: Adds Blight absorption to Elemental Shield.
Chaos Vortex: Creates a randomly moving blight damage storm.
Quintessence: Resistance piercing sustain for Blight.
Fire
Fevered Rush: Boosts global speed and mana regen.
Wildfire
Twisted Explosion: Blight damage explosion that leaves flames.
Water
Corrupted Blood: Boosts life and cures poison.
Ice
Tainted Winter: Blight damage cone that inflicts freeze.
Earth
Vile Mud: Creates a zone that slows and does blight damage.
Stone
Crystalline Snares: Ranged burst that inflicts bleeding and pin.
Air
Fell Wind: Knockback beam that inflicts disease.
Storm
Blightning: Chaining blight damage that inflicts daze.
Arcane
Blight Aura: Blight version of Arcane Vortex.
Aether
Soul Siphon: Arcane damage you do restores your mana.
Elemental Fusion
Molten Boulder: Slow moving beam does fire/physical damage.
Scalding Geyser: Explosion of fire/cold damage.
Plasma Bolt: Fire/lightning beam.
Avalanche: Cold/physical cone.
Thunderbolt: Lightning/physical nova.
Liquid Lightning: Cold/Lightning chain.
Arcane Elements
Ruby Ray: Fire/arcane beam with dispel.
Bright Aura: Reduces arcane self damage and blinds adjacent enemies.
Aetherial Wave: Cold/arcane nova with knockback and wetness.
Arcane Depths: Increases max mana and life regen.
Mage Armour: Increases crit reduction, spell save and physical save.
Medusa Gaze: Physical/arcane cold that inflicts petrify.
Mage Wind: Increases defence, movement and spell speed.
Arc Rift: Restores mana and unleashes random lightning/arcane bursts.
Mana Alchemy
Mana Charge: Increases max mana and regen.
Quicken Inscriptions: Removes saturation and lowers inscription cooldowns.
Glowing Orb: Lite and arcane explosion.
Inscription Mastery: Boosts the strength of all inscriptions.
Poison Alchemy
Poison Infusion: Bombs do poison damage.
Poison Coat: Bombs add poison damage to golems attacks.
Chloroform: Sleep bomb.
Mutation: Increases your physical power/save, max life, life regen and adds poison damage to your attacks.
Metal Alchemy
Metal Infusion: Bombs do bleeding damage.
Shrapnel Shield: Bombs cover golem with a spikey damage shield.
Razor Wire: Pin/bleed wall.
Golem Suit: Temporarily merge with your golem.
Herbalism
Remedy: Boosts poison/disease immunity.
Healing Salve: Healing touch.
Quickness Potion: For running away.
Frenzy Potion: For boosting attack speed.
Staff Magic
(Channel Staff)
Staff Warding: Allows your staff to use Ward.
Staff Blast: Super powered Channel Staff.
Elemental Harmony: Channel incoming magical energy through your staff into a buff.
Staff Combat
(Staff Mastery)
(Blunt Thrust)
(Defensive Posture)
Staff Whirl: Staff spin attack.
Ordered Hedgemagic
Arcane Smite: Melee attack that knocks enemies flying.
Perfect Step: Like Dimensional Step.
Hold: Stuns and pins enemies.
Fire Shield: Does fire/arcane damage to attackers.
Chaotic Hedgemagic
Wild Bolts: Fires a random bolt each turn.
Scatter: Randomly teleports all nearby creatures.
Chaos Armour: Powerful but unreliable shield.
Arcana Unleashed: Creates slowly spreading arcane fire that can burn through anything.
Inanimation
Flying Weapon: Ranged attack with your weapon.
Animate Weapon: Turn a weapon into a minion.
Bladestorm: Bleeding damage storm.
Shield Guardian: Allows equipping of a shield in TK slot.
Enchanted Weapons
Enchant Weapon: Buffs a weapon.
Enchanted Weapon Mastery: Mastery talent for enchanted weapons.
Fortify Weapon: Buffs Enchant Weapon.
Enchanted Pommel Gem: Socket a gem into a weapon.
Enchanted Armour
Enchant Armour: Buffs an armour.
Enchanted Armour Mastery: Mastery talent for enchanted armour.
Fortify Armour: Buffs Enchant Armour.
Arcane Bindings: Buffs Enchant Armour more.
Enchanted Trinkets
Enchant Cloth/Leather: Buffs cloth/leather armour.
Fortify Magic: Buffs staves and wands.
Enchanted Jewellery: Add gems to rings/amulets.
Runestaff: Buff a staff with a rune.
Disenchantment
Disenchant Item: Debuffs items.
Disenchant Creature: Basically Dispel Magic.
Haywire: Manaburn explosion that inflicts spell failure.
Unweaving: Chance to cure magical debuffs from self each turn.
That is a lot.

I hope I didn't miss any.