Notes:
+5 Bonus: The earlier examples were not running around with +5 weapons, by the way - that's the impact that having a cleric or wizard with Greater Magic Weapon has... at 16th level, it gives +5 and lasts for 16 hours. Any cleric or wizard worth their salt as the team tactician should have this on key fighters' weapons at all times.
hong: DMG, p.43, Table 2-24, "Starting Equipment for PCs above 1st level", 16th level = 260,000 GP. In the notes above the table, it says, "Not that these values apply only to PCs. NPCs use Table 2-44: NPC Gear Value". On p.58, Table 2-44, a 16th level NPC gets 77,000 GP.
Stacking Bow + Arrow enhancements: DMG, p.183, last paragraph, "Unlike most enhancement bonuses, but similar to the way in which armor and shields work together, the enhancement bonuses of magic ranged weapons and magic ammunition stack for attack and damage purposes."
If you get rid of this, the archer's high average damage drops like a rock.
Mr Melee
Human Fighter, level 16
260,000 GP
no more than 40,000 GP in any single item.
Atts: Standard Array
STR 19/25 (15+4 for levels)
DEX 14
CON 13/17
INT 12
WIS 10
CHR 8
HP: 108 (140 while wearing the amulet)
AC: 27
BAB 16/11/6/1
Total Attacks: +27/+27/+22/+22/+17/+12
Ambidexterity
Two-Weapon Fighting
Improved Two-Weapon Fighting
Weapon Focus x2 (Longsword + Short Sword)
Weapon Specialization x2 (Longsword + Short Sword)
Improved Critical x2 (Longsword + Short Sword)
Power Attack
Cleave
Great Cleave
somethin'
somethin'
Magic Items
Longsword +1, Keen, Icy Burst (32,315 GP)
Shortsword +1, Keen, Icy Burst (32,310 GP)
Ring of Evasion (25,000 GP)
Ring of Protection +3 (18,000 GP)
Full Plate +5 (25,000 GP)
Amulet of Health +4 (16,000 GP)
Belt of Giant Strength +6 (36,000 GP)
Wings of Flying (5,500)
roughly 70,000 GP left over for miscellaneous stuff
Constantly Up Spell: Greater Magic Weapon (+5) on swords
AVG DMG w/Full Attack
Enemy AC 10: 126.9
Enemy AC 20: 116.8
Enemy AC 25: 101
Enemy AC 30: 74.2
Enemy AC 35: 41
Enemy AC 40: 22
Enemy AC 45: 8.7
Avg Damage on a successful hit: 22 or 21
Max Damage on a crit: 76 or 70
Maximum Concievable Damage In One Round w/All 20s: 444
For comparison, NO Greater Magic Weapon:
Enemy AC 10: 125.79
Enemy AC 20: 105.5
Enemy AC 25: 80.9
Enemy AC 30: 47.6
Enemy AC 35: 14.6
Enemy AC 40: 10.9