Is this class balanced?
Soothsayer
Saves: Fort (bad), Ref (bad), Will (Good)
Bab: As Wizard
HD: d4
Special Abilities
lv01 Lore, Initiative Bonus +1
lv02 Bonus Feat, Trapfinding
lv03 Advanced Learning
lv04 Skill bonus, Skepticism +1
lv05 Initiative Bonus +2
lv06 Bonus Language
lv07 Advnaced Learning
lv08 Bonus Feat, Uncanny Dodge
lv09 Initiative Bonus +3
lv10 Reflex Save Bonus +1
lv11 Advanced Learning, Skepticism +2
lv12 Bonus Language, Skill Bonus
lv13 Initiative Bonus +4
lv14 Bonus Feat
lv15 Advanced Learning
lv16 Improvede Uncanny Dodge
lv17 Initiative Bonus +5, Skepticism +3
lv18 Linguistics
lv19 Advanced Learning
lv20 Bonus Feat, Reflex Save Bonus +2, Skill Bonus, Unshakable Will
Official Spell progression for this class type
lv01 5/3
lv02 6/4
lv03 6/5
lv04 6/6/3
lv05 6/6/4
lv06 6/6/5/3
lv07 6/6/6/4
lv08 6/6/6/5/3
lv09 6/6/6/6/4
lv10 6/6/6/6/5/3
lv11 6/6/6/6/6/4
lv12 6/6/6/6/6/5/3
lv13 6/6/6/6/6/6/4
lv14 6/6/6/6/6/6/5/3
lv15 6/6/6/6/6/6/6/4
lv16 6/6/6/6/6/6/6/5/3
lv17 6/6/6/6/6/6/6/6/4
lv18 6/6/6/6/6/6/6/6/5/3
lv19 6/6/6/6/6/6/6/6/6/4
lv20 6/6/6/6/6/6/6/6/6/5
though it should be
lv01 5/3
lv02 6/4
lv03 6/5/3
lv04 6/6/4
lv05 6/6/5/3
lv06 6/6/6/4
lv07 6/6/6/5/3
lv08 6/6/6/6/4
lv09 6/6/6/6/5/3
lv10 6/6/6/6/6/4
lv11 6/6/6/6/6/5/3
lv12 6/6/6/6/6/6/4
lv13 6/6/6/6/6/6/5/3
lv14 6/6/6/6/6/6/6/4
lv15 6/6/6/6/6/6/6/5/3
lv16 6/6/6/6/6/6/6/6/4
lv17 6/6/6/6/6/6/6/6/5/3
lv18 6/6/6/6/6/6/6/6/6/4
lv19 6/6/6/6/6/6/6/6/6/5 (/3)
lv20 6/6/6/6/6/6/6/6/6/6 (/4)
Lore: Bonus equal to 1/2 soothsayer level. Stacks with Loremaster lore ability.
Linguistics: Gain a bonus language plus a bonus feat from the following list
Linguistics Bonus Feats: Dark Speech (BoVD, FC1, FC2), Minor Utterance of the Evolving Mind (ToM), Scribe Scroll, Skill Focus (Decipher Script, Forgery, or Truespeech), Utterance of the Evolving Mind (ToM), Words of Creation (BoED)
Reflex Save Bonus: Insight bonus of the indicated amount
Skill bonus: +1 insight bonus each time to one of the Following: Appraise, Decipher Script, Gather Information, Heal, Knowledge (pick one), Sense Motive, Spellcraft
Skepticism: Insight bonus of the listed amount to will saves to disbelieve
Unshakable Will: If a 20th level soothsayer makes a successful Will saving throw against an effect that normally has a partial effect on a successful save, there is instead no effect. An unconscious soothsayer does not gain the benefit of Unshakable Will.
General Bonus Feat List:
Alertness, Appraise Magic Value (CAd), Arcane Disciple (CD), Arcane Thesis (PHB2), Blind Fight, Brew Potion, Communicator (CA), Cool Head (CSco), Diligent, Disguide Spell (CAd), Dodge, Enlarge Spell, Eschew Materials, Extend Spell, Eyes in the Back of Your Head (CW), Graft Flesh (LOM, FF), Greater Spell Focus (Divination only), Hear the Unseen CAd), Improved Initiative, Insightful (CA), Insightful Divination (CM), Insightful Reflexes (CAd), Investigator, Iron Will, Jack of All Trades (CAd), Lightning Reflexes, Magical Aptitude, Magic Disruption (CM), Magic Sensitive (CM), Metamagic School Focus (Divination) (CM), Mystic Backlash (CM), Negotiator, Night Haunt (CA), Obscure Lore (CAd), Open Minded (CAd, EPH), Persuasive, Scribe Scroll, Self-Sufficient, Spell Focus (Abjuration, Divination, Transmutation, or Necromancy), Spell Penetration, Sunlight Eyes (CM), Track, Vatic gaze (PHB2), Widen Spell
Class Skills:
Appraise, Autohypnosis (EPH), Concentration, Craft, Decipher Script, Diplomacy, Gather Information, Handle Animal, Heal, Knowledge (all), Listen, Perform (Oratory), Search, Sense Motive, Speak Language, Spellcraft, Spot, Survival, True Speach (ToM), Use Magic Device
Spellcasting:
Intelligence determines spell save DC
Wisdom determines bonus spells
Otherwise as Warmage, Beguiler, and Dread Necromancer.
Spell List
Lv0- Amanuensis (sc), Arcane Mark, Dawn (sc), Detect Poison, Detect Magic, Guidance, Know Direction, Light, Naturewatch (sc), Read Magic, Silent Portal
Lv1- Alarm, Allied Footsteps (cm), Amplify (sc), Appraising Touch (sc), Bloodhound (sc), Comprehend Languages, Dancing Lights, Detect Animals or Plants, Detect Chaos/Evil/Good/Law, Detect Secret Doors, Detect Snares and Pits, Detect Undead, Faerie Fire, Find Temple (sc), Guided Path (sc), Guiding Light (sc), Identify, Instant Search (sc), Know Greatest Enemy (sc), Living Prints (sc), Message, Omen of Peril, Spontaneous Search (sc), Targeting Ray (sc), True Casting (cm) True Strike, Vigilant Slumber (cm), Vision of Glory (sc)
Lv2- Animal Messenger, Circle Dance (sc), Continual Flame, Corpse Candle, Deathwatch, Detect Thoughts, Discern Shapechanger (sc), Erase, Eyes of the Avoral (BOED), Find Traps, Healthful Rest (sc), Hide From Animals, Hold Portal, Listening Lorecall (sc), Locate Object, Low Light Vision (sc), Luminous Gaze (sc), Magic Aura, Master's Touch (sc), Mending, Sanctuary, Scent (sc), See Invisibility, Sleep, Songbird (SC) (oratory only), Speak With Animals, Speak With Plants, Ventriloquism, Zone of Truth
Lv3- Analyze Portal (sc), Anticipate Teleportation (sc), Arcane Sight, Clairaudience/Clairvoyance, Darkvision, Discern Lies, Find the Gap, Fox's Cunning, Glitterdust, Healing Lorecall (sc), Invisibility Purge, Know Opponent (sc), Know Vulnerabilities (sc), Lesser Telepathicv Bond (sc), Listening Coin (sc), Locate Object, Make Whole, Mechanus Mind (SC), One With The Land (sc), Owl's Wisdom, Protection From Good/Evil/Law/Chaos, Speak With Dead, Speechlink (sc), Tongues, Weather Eye (sc)
Lv4- Arcane Eye, Arcane Lock, Assay Spell Resistance, Blessed Sight (BoED), Blindsight (sc), Calm Emotions, Chain of Eyes, Daylight, Detect Scrying, Divination, Enthrall, Helping Hand, Implacable Pursuer (sc), Interplanar Message (sc), Lay of the Land (sc), Locate Creature, Remove Blindness/Deafness, Safety (sc), Scent (sc), Scrying,
Lv5- Commune, Commune With Nature, Contact Other Plane, Deeper Darkvision (sc), Dispel Magic, Dream, Echo Skull, Leomund's Tiny Hut, Magic Circle Against Good/Evil/Law/Chaos, Prying Eyes, Sending, Sonorous Hum (sc), Telepathic Bond, Zone of Revelation (sc)
Lv6- Analyze Dweomer, Break Enchantment, Create Food and Water, Dream Sight (sc), Knock, Legend Lore, Lesser Geas, Nondetection, Probe Thoughts, Psychic Poison (BOVD), Secret Page, Stone Tell, True Seeing, Wall of Light
Lv7- Brain Spider (sc), Dismissal, Greater Arcane Sight, Greater Dispel Magic, Greater Scrying, Illusory Script, Leomund's Secure Shelter, Lesser Planar Binding, Mass Fox's Cunning, Mass Owl's Wisdom, Telepathy Block (BOED), Vision
Lv8- Cure Light Wounds, Discern Location, Geas, Greater Prying Eyes, Hindsight (sc), Lesser Planar Ally, Mental Pinnacle (EPH), Moment of Prescience, Scramble Portal (sc)
Lv9- Astral Projection, Awaken, Banishment, Cure Moderate Wounds, Eye of Power (sc), Fiendish Clarity (BOVD), Foresight, Planar Binding, Seal Portal (sc)
EDIT:
fixed a typo in the spell progression