Dual-balanced [weapon mod] + Hand's Autonomy [feat] = -1 for two weapon attacks with rapiers on top of a +1 hit/dam for your main weapon.
This takes 3 feats [Two weapon fighting, Possessed Hand and Hand's Autonomy] and 4000gp though. Well 4 feats to use the rapier with a mod [exotic or Weapon Adept].
Of course, you could just go Two weapon fighting, Possessed Hand and Hand's Autonomy and ignore balanced and go with a -2 for two weapon fighting.
Play elf or half elf, they have the best racial weapons and they are great amazing wonderful good.
Adventurer's Armory 2 is your friend.
I like daggers. They are common and easy to hide. And your sneak attacks don’t benefit from crits anyway. And you can throw them if something is out of your reach.
Swashbuckler archetype gives you martial proficiency.
If you manage to get exotic by being a half elf the wakizashi is just plain better than the kukri.
Does the -2 to concentration checks effect the rogue at all?
Not much unless you take the minor/major magic talent.
What is the best use of these 2 feats.
Two weapon fighting.
The unchained rogue is proficient in rapiers, I'm not really sure what the 4th feat is that you are talking about.
Weapon mods change the category up one, making rapiers with mods exotic and require a feat to use [even if you get base rapiers as a proficiency].
Graystone - it seems you are saying rapier is the best option with these couple feats?
Depends how many feats you want to spend on them and that other feats you want to spend elsewhere. Best is going to depend on what you want to do, what race/class abilities you have and various other factors.
For myself, I prefer an elven branched spear for 1.5 two handed dex damage and getting reach attacks of opportunity with combat reflexes. ;)
River Rat trait gives you +1 to swim, +1 to damage with daggers, and makes swim a class skill.
Negates the damage advantage of the short sword on top of the bonus to swim.
Dagger also does piercing or slashing (as opposed to just piercing of short sword), has a throwing range, and has a bonus to sleight of hand checks.
River Rat trait gives you +1 to swim, +1 to damage with daggers, and makes swim a class skill.
Negates the damage advantage of the short sword on top of the bonus to swim.
Dagger also does piercing or slashing (as opposed to just piercing of short sword), has a throwing range, and has a bonus to sleight of hand checks.
Well if you go dagger, then you want Pharasma's Deific Obedience [+2 to hit with daggers].
Daggers and short swords are well supported with magic items. Look up the dagger of doubling and the sword of subtlety for examples. There just aren't as many or as good kukris out there, and specific magic rapiers seem to be overpriced in general.
Though, effortless lace makes rapiers easy to use where it's allowed.
In terms of damage, daggers with the knife master archetype, and the river rat trait are generally the best way to go.
At later levels I like to pick up lunge and ranged skills so the character can threaten for flanking from 5ft away for SA, and get extra damage and attacks from throwing.