Dwarven Paladin4/Fighter1/Barbarian1
32 point buy
Str16 Dex8 Con20(18+2) Wis11 Int8 Cha10(11-2+1)
Feats:
Spellfire Wielder
Mounted Combat
Spirited Charge
Ride-By Attack
Boots of Speed: 8000 gp
Rhino Hide Armor: 5165 gp
(Hmm… he’s 165 gp over the limit. Maybe he has a rich uncle.

)
If there is a caster around to Haste you, then buy something like a +1 Lance and some Gauntlets of Ogre Power, which will add 5 points to the lance attack damage (7 if he crits).
Buff yourself…
1) Rage.
2) Have your friendly caster pump 4 more levels of spells into your storage.
3) Haste yourself with the boots.
Then in one round…
4) Charge with lance while smiting and raging
5) As a partial action, release Spellfire as a touch attack.
+15 with hit while charging and raging
Lance damage (wielding lance with both hands): 1d8+11 *4 = ~60 damage if he hits
Spellfire damage: 24d6 = ~72 damage if he hits
Average Damage: ~132
Average damage w/ a crit = ~162
Max Damage = 220
Max Damage w/ a crit = 258
So, if you hit and roll maximum damage, you’ll do over 200 points of damage in a round.

If not, you still do over 100. Unfortunately, your AC will be 10.

(9 base +5 from the armor -2 from the charge –2 from raging.)
Okay, so it’s not really a smackdown. But it’s the closest that I could get at such a low level.
