+18 BAB, +8 Str(16+4 levels+6 enhancement(probably a manual, but whatever)), +5 Vicious Flaming Shocking Frost Keen Falchion(DMG expects half the gold on one item, 200k is less than half an 18th level character's expected wealth)=+31 before feats
Feats:
1
odge
1:Mobility
1:Weapon Focus(Falchion)
2
ower Attack
3:Spring Attack
4:Weapon Specialization(Falchion)
6
ower Attack
6:Improved Buckler Defense
8:Greater Weapon Focus(Falchion)
9:Cleave
10:Melee Weapon Mastery(Slashing)
12:Greater Weapon Specialization(Falchion)
12:Shield Specialization
14:Slashing Flurry
15:Great Cleave
16:Combat Expertise
18:Whirlwind Attack
18:Weapon Supremacy(Falchion)
Attack:31+2(Greater Weapon Focus)+2(Melee Weapon Mastery)-1(Buckler)+1(Boots of Speed)=34-5 Slashing Flurry=29
Damage:2d4(5)+12(Str)+5(Enhancement)+5d6(Flaming, Shock, etc)(17.5)+4(Greater Weapon Specialization)+2(Melee Weapon Mastery)=45.5 damage
You guarantee your first attack by taking 10, then your second attack(haste) has a 75% chance, as does your third(Slashing Flurry). Add +5 to your fourth attack for a 75% chance of success, then your fifth attack has a 25% chance and your last has a 5% chance of hitting.
Before crits, you have (100+75+75+75+25+5)/100*45.5=161.525 damage.
Edit: Sorry for the miscalculation. Even higher damage.
Feats:
1

1:Mobility
1:Weapon Focus(Falchion)
2

3:Spring Attack
4:Weapon Specialization(Falchion)
6

6:Improved Buckler Defense
8:Greater Weapon Focus(Falchion)
9:Cleave
10:Melee Weapon Mastery(Slashing)
12:Greater Weapon Specialization(Falchion)
12:Shield Specialization
14:Slashing Flurry
15:Great Cleave
16:Combat Expertise
18:Whirlwind Attack
18:Weapon Supremacy(Falchion)
Attack:31+2(Greater Weapon Focus)+2(Melee Weapon Mastery)-1(Buckler)+1(Boots of Speed)=34-5 Slashing Flurry=29
Damage:2d4(5)+12(Str)+5(Enhancement)+5d6(Flaming, Shock, etc)(17.5)+4(Greater Weapon Specialization)+2(Melee Weapon Mastery)=45.5 damage
You guarantee your first attack by taking 10, then your second attack(haste) has a 75% chance, as does your third(Slashing Flurry). Add +5 to your fourth attack for a 75% chance of success, then your fifth attack has a 25% chance and your last has a 5% chance of hitting.
Before crits, you have (100+75+75+75+25+5)/100*45.5=161.525 damage.
Edit: Sorry for the miscalculation. Even higher damage.
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