I'd like to present a Build based on the Weapon Master Prestige Class. I originally used this Build in HotU and thus the first part of this Strategy Guide will focus on that.
Conceptual Thoughts:
The Weapon Master Prestige Class has a number of Features that mostly improve your critical hits, to use that to it's fullest extent, it's mandantory to get as many attacks with the Weapon Master's chosen weapon as possible.
The answer of course is dual wielding.
Since we want to use the same type of Weapon in both hands (to fully utilize the Weapon Master's class features) the best choice is on of the two-sided weapons, since this way we get both the improved damage of medium size weapons and the lower penalty for using a small weapon in the off-hand.
Alternative approaches could focus on the Scythe (and thus foregoing the two weapon fighting feats) for it's massive critical multiplier of x4, the Rapier, a light weapon with a great threat range of 18-20 (you would not need Exotic Weapon Proficiency) and the Katana for higher base damage (but it's not a light weapon and you wouldn't save any feats).
I will focus on double Weapons here.
The choice is between The Two-bladed Sword, the Double Axe and the Dire Mace.
The Dire Mace offers nothing to this Build, so it's out.
The Sword offers a higher threat range (of 19-20), while the Axe offers a higher multiplier of x3.
Which one you take is up to you, (I chose the sword because I think it looks far mroe stylish
Character Creation:
Race: Human, no way around it if you don't want an experience penalty.
Attributes:
Strength 16 (for attack/damage bonus and you will need a STR of 21(25) for Overwhelming (Devastating) Critical Feast.)
Dexterity 15 (Minimum for Improved Two Weapon Fighting)
Constitution 14
Wisdom 10 (no penalties)
Intelligence 14 (you need 13 to get all necesarry feats, so why not also take that extra skill point?)
Charisma 10 (no penalties)
If you want to, you could easily live with CHA and WIS 8 and get CON 16.
As I've said I've used this build in HotU where you get to start at level 15, my choices during those levels have thus been made with the fact in mind that I wouldn't actually have to play this build while below level 15.
This is how I did it in HotU:
Class: Rogue (for lots of Skill Points)
Feats: Exotic Weapon Proficiency, Dodge.
Skills: Intimidate 4, nothing else (I saved them all to spend them all on levels 14 & 15)
Then we switch to Fighter:
Level 2 (F1/R1):
Weapon Focus
Lvl 3 (F2/R1):
Dodge
Expertise
Lvl 4(F3/R1)
raise STR to 17
Lvl 5(F4/R1)
Mobility
Lvl 6(F5/R1)
Spring Attack
Lvl 7 (F6/R1)
Whirlwind Attack
Lvl 8 (F6/R1/W1)
Now take your first level of Weapon Master and raise STR by 1
Lvl 9 (F6/R1/W2)
Ambidexterity
Lvl 10 (F6/R1/W3)
Lvl 11 (F6/R1/W4)
Lvl 12 (F6/R1/W5)
Two Weapon Fighting
+1 STR
Lvl 13 (F6/R1/W6)
Lvl 14 (F7/R1/W6)
Improved Critical
Maximize Discipline (17 Ranks)
Lvl 15 (F7/R2/W6)
Improved Two Weapon Fighting
Maximize Tumble, Use Magical Item, Lore and spread the rest of your skill points as you see fit.
HtuO begins here.
Keep increasing dsicipline and Lore whenever you can, and save the rest of the skill points for your rogue levels, always save at least 2 skill points at each non rogue level.
Lvl 16 (F7/R1/W7)
This is the maximum Weapon Master Level that we want, because after that it doesn't offer much anymore.
+1 STR
Lvl 17 (F8/R1/W7)
Power Attack (prerequisit for Overwhelming Crit)
Lvl 18 (F8/R2/W7)
Cleave
21 ranks Tumble (for +4 AC) and Use Magic Item
Lvl 19 (F8/R3/W7)
Lvl 20 (F8/R4/W7)
+1 STR (to 21)
Lvl 21 (F8/R5/W7)
Overwhelming Critical
Lvl 22 (F8/R6/W7)
you should now have Tumble & Use Magic Item 25, for +5 AC and the abillity to use almost every single item in the game (there have been maybe 5 that I was unable to use)
The reason we have only leveled up Rogue during the last couple of levels is to bring our Rogue level within 1 of your Weapon Master level, thus allowing us to once again advance as a fighter without incurring an XP penalty.
Lvl 23 (F9/R6/W7)
Nothing much to do.
Lvl 24 (F10/R6/W7)
Greater Strengh I&II
STR +1 (you now have a strength of 24)
Lvl 25 (F11/R6/W7)
Lvl 26 (F12/R6/W7)
Weapon Specialization
Lvl 27 (F13/R6/W7)
Your choice of Feat, Armor Skin and Great Dexterity are a good choice as are Epic Prowress and Epic Weapon Focus
Lvl 28 (F14/R6/W7)
Raise Strength to 25
Great Cleave
Devastating Critical
Playing this Build from Lvl 1 on up:
Start as a Rogue, but spend your skill points anyway you like, but save 5 for Discipline.
Take as feats Exotic Weapon Proficiency and Two Weapon Fighting
Lvl 2:
Take a fighter level.
Feats: Ambidexterity, Weapon Focus
Get 5 Ranks of Discipline and add another rank to Lore
Now we have achieved a certain competence in our chosen Weapon that should last us for some time.
Lvl 3:
Take either another Fighter or take a Rogue Level for Tumble 6 (and the +1 AC that comes with it)
Feat: Dodge & Expertise (if Fighter)
Lvl4:
STR+1
Take a Rogue level if you took a Fighter level at level 3 and vice versa.
If Fighter, take expertise now.
Lvl5:
Fighter lvl 3
Lvl6:
Fighter lvl 4
Feats: Weapon Specialization, Mobility
Lvl 7
Fighter lvl 5
Lvl 8
STR +1
Fighter lvl 6
Feat: Spring attack
Level 9
Fighter lvl 7
Feat: Whirlwind Attack
Level 10
Weapon Master lvl 1
Level 11
Weapon Master Lvl 2
Level 12
STR +1
Weapon Master Lvl 3
Feat: Improved Critical
Level 13
Rogue Level 3 (you have to keep Rogue and Weapon Master within one level of each other in order to avert an XP Penalty)
Level 14
Weapon Master 4
Level 15
Rogue Level 4
Feat: Improved Two Weapon Fighting
Level 16
Weapon Master Level 5
STR +1
Level 17
Rogue Level 5
Level 18
Weapon Master Lvl 6
Feat: Power Attack
Level 19
Weapon Master Lvl 7
Level 20
STR +1
Fighter Level 8
Feat: Cleave
Level 21
Rogue Level 6
Feat: Greater Cleave
Level 22
Fighter Level 9
Level 23
Fighter Level 10
Feat: Overwhelming Critical
Equipment:
A keen weapon is of course the first choice for Critical Bill, also note that magical damage boni get multiplied when you score a critical, so look out for those too.
Haste is always good since it grants you yet another attack to the 6 you allready have each round, and more attacks means more chances for criticals
Apart from that, anything that pushes your STR is a blessing and since you don’t have Toughness, you should try to get your hands on stuff that raises your CON.
This Build is perfectly capable of doing 300+ damage in a round, which mostly floors even the big boys and lets you use your cleave and great cleave feats to their fullest potential even late in the game.
Watch out for enemies who are immune to critical hits and sneak attack, espc. The higher level golems are a pain in the ass.
Happy slaughtering.