A possible build could include a 2 level dip into Master of Many Styles monk to gain Fuse Style. This would allow you to combine Ascetic Style (Butterfly Sword) with Dragon Style. Dragon Style/Ferocity give you x2 Str to your first attack and 1.5 with the rest. Ascetic Strike lets you use the unarmed strike damage of a monk 4 lvls lower than you in place of your weapons base damage. At 16th lvl, while multi-weapon fighting with your butterfly swords, you would have 6 attacks dealing 2d6+1.5 STR. Note that the above build could instead be accomplished with a dip into Free Style Fighter, maintaining full bab and netting you an additional attack. But you'd need to spend a feat on Stunning Fist to qualify for Dragon Ferocity.
Thanks again, for all the input. I'll try out everything... my current build (The aforementioned slayer) ended up with this (not sure if this is 'good' or not).
BTW... this is maximum... boots of speed (haste), raging, sneak attack, everything... so not the typical hit.
8 attacks at +27 (2 at 1d4+24 +5d6 Sneak Attack, 6 at 1d4+16 +5d6 Sneak Attack)
3 attacks at +22 (1 at 1d4+24 +5d6 Sneak Attack, Others at 1d6/1d4+12 +5d6 Sneak Attack)
1 attack at +17 (1d4+24 +5d6 Sneak Attack)
That's 3 level Rogue for Weapon Finesse/Damage.
2 levels Barbarian for a Bite Attack
1 Mammoth Lord Helmet
And of course, 10 levels of Slayer (because the Stygian stuff is awesome)
Not sure what the 16th level should be, so made it Barbarian for longer Rage.
I'll try now with a fighter, but worry that it will be boring with no 'powers' other than fighting. :P
Awww.. Sphynx, you didn't like my huge whirlwind build?
15ft reach with dual cleave attempts! Anything that dies during a cleave allows you to attack again at any target you threaten!
Seems a good TWF really requires a Fighter (or tempered paladin) because my calculations say I won't be doing any damage against anything with DR... Tried building a slayer, that I really like, but his damage is terrible without specialization and penetrating...You'll bypass DR just fine. Make 1 Kukri Cold Iron. Make another Adamantine. Put a Shield in 1 of your arms. So now you can bypass DR/ Cold Iron, Adamantine, Slashing, and Bludgeoning (Shield Bash).
And, if as Dαedαlus suggested, you go Warpriest, all your Kukri's will do Sacred Weapon Damage instead of 1d4. Also, with their Class Abilities and Cleric Spells, Warpriests have lots of ways to do extra Damage and Bypass DR.
And remember the whole point of using Kukris is the Threat Range of 18-20: You ARE taking Improved Crit, right? and Crit Focus? Take the Holy Tactician Archetype, and make your Teamwork Feat Outflank or Seize the Moment, and you will pass out Attacks of Opportunity with every Crit, and with 3 Kukris, Crit Focus, and Improved Crit, there will be a great many.
You could use this same idea to go WarPriest6/PsyWar10 if you wanted, you'll have to drop 1 feat though, but I'd say it's worth it. War Priests are awesome for action economy, and WP and PsyWar are both Wis based for spells/powers.
Not that I don't like the idea, just haven't tried it yet, though I do think that any 2-handed weapons go counter to my visuality of the character... Prefer to stick with 1-handers.
Also, maybe I'm mis-reading today, but it seems that a WarPriest only gets his bonus on one of his weapons, not all of them?
one weapon type so great sword or kukri or short sword ect.Not that I don't like the idea, just haven't tried it yet, though I do think that any 2-handed weapons go counter to my visuality of the character... Prefer to stick with 1-handers.
Also, maybe I'm mis-reading today, but it seems that a WarPriest only gets his bonus on one of his weapons, not all of them?
But that requires 4 Swift Actions, which means that on the round all 4 weapons are made Sacred, you've already lost 3 turns, and can only go 3 more rounds at 16th level.... If there were a way to activate all 4 weapons in the same turn, that might be interesting... but even then, at 16th level, that'd only work for 4 turns... no?
Go fighter; if you're going with kukri's get the focused weapon advanced weapon training option, if you're going scimitar, get effortless dual wielding & fighter's finesse as well as focused weapon so you can treat them as light weapons for the purposes of dual wielding and can use weapon finesse with them, all while doing 2d6 damage at level 16.
You'll also want the modified weapon proficiency feat from Adventurer's Armory 2, give them the modification that reduces dual wielding penalties by 1 so you'll only be taking a -1 on attack rolls.
The agile weapon special ability is also a good get. +1 cost, allows you to apply dex to damage.