I found my Iron Golem killer character: (db means pieces I forgot to translate it and it is not so easy to replace it from my handy)
Iron Golem Killer Githzerai
=================
Race: Githzerai
BP:28
STR: 8
DEX: 22=16+6 10
CON: 16 10
INT: 6=8-2
WIS: 18=(15+1)+2 8
CHA: 8
Alignment: LN
Classes:
1. Monk
2. Ranger
3. Fighter
4. Cleric
5. Druid
HP: 42=5*3+8+1*5,5+3*4,5
BAB=2
FORT: 17=3+2+2+2+2+2+2+2 (Ability + 5 class + cloak + feat)
REFL: 12=6+2+2+0+0+0+2 (Ability + 5 class + cloak)
WILL: 12=4+2+0+0+2+2+2 (Ability + 5 class + cloak)
AC: 24=10+6+4+4 (dex+wis+psi armor)
Attack: 9=2+6+1 (BAB + DEX + Weapon)
Touch Attack: 8=2+6
Damage: 1d8
Feats:
======
1. Greater Fortitude
1. Stunning Fist (Monk)
2. Track (Ranger)
3. Weapon Finesse
3. Dodge
Skills:
=======
Tumble: 5
Escape Artist: 7
Potions:
========
250gp Alter Self (CL:3 30min)
1200gp Barkskin +5 (CL:12 120min)
900gp Shield Of Faith +5 (CL:18 18min)
500gp 2db Reduce Person (CL: 5 5min)
300gp 2db Enlarge Person (CL: 3 3min) (It doesn't matter, just for fun)
250gp Shield (CL:5 5min)
500gp Cat's Grace (CL:5 5min)
500gp Owl's Wisdom (CL:5 5min)
500gp Bear's Endurance (CL:5 5min)
750gp Heroism (CL:3 30min)
300gp Invisibility (CL:3 3min)
-------
5950gp
Scrolls:
========
750gp 2db Water Breathing (CL:5 10hour)
1400gp 2db Freedom of Movement (CL:7 70min)
4200gp 6db Rusting Grasp (CL:7 7round)
------
6350gp
Items:
======
4000gp Cloak of Resistance +2 (It doesn't matter, just for fun)
2300gp +1 Rapier (It doesn't matter, just for fun)
Tactics:
========
He used the spells in this order (Scroll+Potion):
Water Breathing (CL:5 10hour)
Freedom of Movement (CL:7 70min)
Alter Self (CL:3 30min) -> Troglodyte (6NA)
Barskin +5 (CL:12 120min)
Shiled Of Faith +5 (CL:18 18min)
Heroism (CL:3 30min)
Reduce Person (CL: 5 5min)
Cat's Grace (CL:5 5min)
Owl's Wisdom (CL:5 5min)
Bear's Endurance (CL:5 5min)
Shield (CL:5 5min)
Invisibility (CL:3 3min) (Just for sure
Fighting Defensively (+3AC -4ATTACK)
He goes in and kills the golem
New Stats:
======
STR: 6
DEX: 28
CON: 20
INT: 6
WIS: 22
CHA: 8
HP: 52=42+5*2
FORT: 21=17+2+2 (18 is enough vs poisons) (Ability increase + Heroism)
REFL: 16=12+2+2 (Ability increase + Heroism)
WILL: 16=12+2+2 (Ability increase + Heroism)
AC: 54=24+6+5+5+(1+1)+4+2+2+1+3 (Alter Self + Barskin + Shield of Faith + Reduce Person + Shield + Cat + Owl + Dodge + Fight Def)
The golem attacks with +23. So it couldn't able to hit him (thanks for the optional rule (20=>30))
Attack: 11 = 9+2+(1+1)+2 - 4 (Heroism + Reduce + Ability increase - Fight Def)
Touch Attack: 10 = 8+2+(1+1)+2 - 4
He reads the Rusting Grasp scrolls inside (7 rounds). He touch the golem many times.
Damage: 17,5 = 10,5 + 7
Golem HP: 129
7 * 17,5 = 122,25 damage => 2 scrolls is enough for him to kill the golem
I didn't calculate with their spells.
=================
Race: Githzerai
BP:28
STR: 8
DEX: 22=16+6 10
CON: 16 10
INT: 6=8-2
WIS: 18=(15+1)+2 8
CHA: 8
Alignment: LN
Classes:
1. Monk
2. Ranger
3. Fighter
4. Cleric
5. Druid
HP: 42=5*3+8+1*5,5+3*4,5
BAB=2
FORT: 17=3+2+2+2+2+2+2+2 (Ability + 5 class + cloak + feat)
REFL: 12=6+2+2+0+0+0+2 (Ability + 5 class + cloak)
WILL: 12=4+2+0+0+2+2+2 (Ability + 5 class + cloak)
AC: 24=10+6+4+4 (dex+wis+psi armor)
Attack: 9=2+6+1 (BAB + DEX + Weapon)
Touch Attack: 8=2+6
Damage: 1d8
Feats:
======
1. Greater Fortitude
1. Stunning Fist (Monk)
2. Track (Ranger)
3. Weapon Finesse
3. Dodge
Skills:
=======
Tumble: 5
Escape Artist: 7
Potions:
========
250gp Alter Self (CL:3 30min)
1200gp Barkskin +5 (CL:12 120min)
900gp Shield Of Faith +5 (CL:18 18min)
500gp 2db Reduce Person (CL: 5 5min)
300gp 2db Enlarge Person (CL: 3 3min) (It doesn't matter, just for fun)
250gp Shield (CL:5 5min)
500gp Cat's Grace (CL:5 5min)
500gp Owl's Wisdom (CL:5 5min)
500gp Bear's Endurance (CL:5 5min)
750gp Heroism (CL:3 30min)
300gp Invisibility (CL:3 3min)
-------
5950gp
Scrolls:
========
750gp 2db Water Breathing (CL:5 10hour)
1400gp 2db Freedom of Movement (CL:7 70min)
4200gp 6db Rusting Grasp (CL:7 7round)
------
6350gp
Items:
======
4000gp Cloak of Resistance +2 (It doesn't matter, just for fun)
2300gp +1 Rapier (It doesn't matter, just for fun)
Tactics:
========
He used the spells in this order (Scroll+Potion):
Water Breathing (CL:5 10hour)
Freedom of Movement (CL:7 70min)
Alter Self (CL:3 30min) -> Troglodyte (6NA)
Barskin +5 (CL:12 120min)
Shiled Of Faith +5 (CL:18 18min)
Heroism (CL:3 30min)
Reduce Person (CL: 5 5min)
Cat's Grace (CL:5 5min)
Owl's Wisdom (CL:5 5min)
Bear's Endurance (CL:5 5min)
Shield (CL:5 5min)
Invisibility (CL:3 3min) (Just for sure
Fighting Defensively (+3AC -4ATTACK)
He goes in and kills the golem
New Stats:
======
STR: 6
DEX: 28
CON: 20
INT: 6
WIS: 22
CHA: 8
HP: 52=42+5*2
FORT: 21=17+2+2 (18 is enough vs poisons) (Ability increase + Heroism)
REFL: 16=12+2+2 (Ability increase + Heroism)
WILL: 16=12+2+2 (Ability increase + Heroism)
AC: 54=24+6+5+5+(1+1)+4+2+2+1+3 (Alter Self + Barskin + Shield of Faith + Reduce Person + Shield + Cat + Owl + Dodge + Fight Def)
The golem attacks with +23. So it couldn't able to hit him (thanks for the optional rule (20=>30))
Attack: 11 = 9+2+(1+1)+2 - 4 (Heroism + Reduce + Ability increase - Fight Def)
Touch Attack: 10 = 8+2+(1+1)+2 - 4
He reads the Rusting Grasp scrolls inside (7 rounds). He touch the golem many times.
Damage: 17,5 = 10,5 + 7
Golem HP: 129
7 * 17,5 = 122,25 damage => 2 scrolls is enough for him to kill the golem
I didn't calculate with their spells.