Ability scores (based on 20 point buy)
Age category (Old age)
STR: 5, DEX: 9, CON: 7, INT: 18, WIS: 12, CHA: 12
Feats: Spell focus (Evokation); Piercing Evocation -Complete Mage

Cantrips - all
1st:burning hands, magic missile, Jet of Steam - complete Mage, shocking grasp, Mage Armor, shield, Protection from X

Concentration: 4 ranks,Craft Alchemy: 4 ranks, Fly: 4 ranks; Knowl(arcana): 4 ranks, Knowl(Planes): 4 ranks, Spell craft: 4 ranks

Increase all ranks to 5
Add Orb of Fire, Lesser and Orb of Acid, Lesser to spell list both from Complete Mage

feat: Add Still Spell
Spells: Add Scorching Ray and Fire burst - Complete Arcane
Increase All Ranks to 6

Ability score point: +1 to Int
Spells: Add Resist Energy and Luminous Swarm - Complete Mage
Increase all ranks to 7

Wizard bonus feat: Metamagic Spell focus (evocation)
Skills: increase all ranks to 8
Spells: add Fireball and Mage Armor, Greater - Complete Arcane

Feat:Sudden Empower -Complete Arcane
Ranks: increase all to 9 ranks
Spells: Add Blink and Arcane Sight

Ranks: increase all to 10 ranks
Spells: Add Fire Sheild and Incendiary Surge - Complete Mage

Ranks: increase all to 11 ranks
Ability score: increase Int
Spells: Add Wall of Fire and Blistering Radiance - Complete Arcane

Ranks: increase all to 12 ranks
Feat: Sudden Maximize
Spells: Add Resounding Thunder - Complete Mage, and Fireburst, greater - Complete Arcane

Wizard feat: Silent Spell
Ranks:increase all to 13
Spells:Mordenkainen's Private Sanctum and Fire shield, mass - complete arcane

Example equipment list: Headband of intelect, rings of deflection and/or bracers of armor
The wizard above is using Fireburst, greater with the Silent spell metamagic feat (using metamagic spell focus to bring it down to +0 spell level) and sudden Empower and sudden maximize feats to deal 120 points of damage, 110 of which is fire and 10 of which is untyped(Piercing Evocation).

Elan Psion (Kinetics) Age: 1100 years old (Venerable category)
Key Stat: Intelligence - 21
Other stats: Strength - 7, Dexterity - 10, Constitution - 10, Wisdom - 13, Charisma - 11 (based on 32 point buy)
Feats - Earth Sense , Bonus - Earth Power.

Concentration - 4, Autohypnosis - 4, Knowledge (Psionics) - 4, Craft (Alchemy) - 4, Psicraft - 4, 8 points floating.

Psion (Kinetics) 5
Key Stat: Int - 22
additional feats: Psionic Meditation, Maximize Power
Skill adjustment: Concentration - 8, additional points spent as you choose.

Psion (Kinetics) 5/Pyrokineticist 5
Key Stat: Int - 23
Additional feats: Overchannel, Chain Power
Skill points spent as you choose.
Key special attacks: Firelash, Bolt of Fire

Psion (Kinetics) 5/Pyrokineticist 10
Key Stat: Int - 24
Additional Feats: Talented, Empower Power
Skill points spent as you choose
Key special attacks: Heat Death, Conflagration, Bolt of Fire, Firelash

Psion (Kinetics) 10/Pyrokineticist 10
Key Stat: Int - 26
Additional Feats: Widen Power, Twin Power
Skill points spent as you choose
Key special attacks: Heat Death, Conflagration, Bolt of Fire, Firelash

5th - Energy Current (fire based), Incarnate
4th - Energy Ball (fire based), Energy Adaptation
3rd - Energy Cone (fire based), Energy Bolt (fire based), Energy Burst (fire based)
2nd - Energy Missile (fire based), Energy Adaptation, Specified, Bestow Power
1st - Energy Ray (fire based), Matter Agitation

Waforged Fighter
STR: 16, DEX: 10, CON: 15, INT: 11, WIS & CHA: 6
Feats: Exotic Weapon proficiency - Warmace(Complete Warrior), Power Attack

Fighter
Feat: Weapon focus - maul

Fighter
Feat: Power attack

Fighter
Attribute: +1 Int
feat: Improved Sunder

Fighter

Fighter
Feats:Improved Bull Rush, Shock Trooper

Fighter

Exotic Weapon Master
Attribute: +1 Int
Stunt - Exotic Sunder

Exotic Weapon Master
Stunt - Stunning Blow
Feat: Combate Expertise

Exotic Weapon Master
Stunt - Trip Attack

Kensai
Signature weapon - maul

Kensai
Attribute: +1 Str
feat:Improved Critical

Kensai

Kensai

Kensai
feat:Greater Weapon focus

Kensai
Attribute: +1 Str

Kensai

Kensai
Feat: Monkey Grip

Kensai

Kensai
Attribute: +1 Str

Did someone say brute force?
Okay, so you may be thinking 'But Reemos! Why a maul? Why increase hit Int for 2 levels instead of Str? Why not Barbarian?' Okay, okay, chill out, jeesh. *crosses her arms*

First of all, all we see is a still frame of him walking, so we don't even know his fighting style. So, I went with fighter, plus he doesn't look like the beserker type too me. Second of all, I increased his Int so he can qualify for Combat Expertise so he can qualify for Kensai. Third, I went with maul to complement the monkey grip feat, use a maul sized for a large sized creature (making it a 2d6 weapon rather than a 1d12 weapon) and there you go with the large weapon held in his left hand. Warforged is the obvious choice.

Exotic weapon master gives other things to do, such as augmenting the sunder weapon attempts, stunning hit opponents and doing trip attempts. Kensai was another semi-obvious choice because rather than having to pay cash for improving the maul, he just has to pay exp.

Example Equipment list
Amulet of Health +6, belt of giants Strength +6, Gloves of Dexterity +6, Manual of gainful exercise, bodily health and quickness of action +6, Maul +5 with the Keen, Speed and Thundering weapon enhancements, Helm of Resistance +6(just a cloak of resistance rebuilt to be a helm instead), Full plate +5 with Spell Resistance(19).