My first question would be, why are you using a CHA-dumped build to perform Demoralise on enemies.
Yeah it might only work later on the game or not even be worth it.
Either way Twin-Bladed Sword is not a very good weapon to throw away an Exotic feat on, and Half-Orc is just a trash race.
Which weapon type would you rather choose for twf str build? Double axe but with Motherless Tiefling or human? Double weapon would be 1.5 str and are light off hand so lesser penalties if I'm not mistaken. Seems good for str stacking twf even though the availability is limited.
You either go non orc and go for Twin Crystals or you go orc and use Faterender, whichever you prefer. Also orc saves you a feat, since you don't need exotic. If you go non orc you'll probably have to cut Accomplished Sneak Attacker for Exotic.
If I were to make a build around two bladed weapons it would be something like this:
Scaled Fist 1/Alchemist 12/Archeologist 2/Dragon Disciple 4
Fuck the demoralize feats, you can't afford them and they are a waste. Just take a proper bard with you with Dirge.
This seems good. How about adding a single Sword Saint level in the middle instead of Fighter at the back and pick the weapon type there? I saw something similar in Haplok's Vivi build. Also are the Archaelogist/DD levels better than additional Vivi levels?
Thank you for the responses.
It'll work, it's just not super effective until your STR score gets big. The point of that feat is to double-dip on ability score bonuses, not to replace a non-existent CHA bonus.
That said, Hap's right when he says it'll probably be OK. I just don't think it's very efficient to invest in these feats long-term when Frightful Aspect on a support Cleric gets it done instantly, no-save, min-per-level duration.
Two-bladed sword is 19-20/x2 for an Exotic feat. That's flat-out worse than weapons you can already equip. Yes there's added efficiency from having one weapon as the source of all your damage, but I'm not certain it's worth a feat, especially considering there are other things you should be picking up at that level (see Hap's comment).
Double weapons do not receive 1.5x STR modifiers. They are considered light off-hand, but that's irrelevant, there are decent off-hand weapons that don't require a feat.
Frankly depending on your team setup TWF might not be the best choice. For starters you need someone wielding Vanquisher - if you haven't got that, then ditch the TWF and go for greataxe instead.
Faterender is rather decent, but any kind of DR reduces its damage significantly. Twin Crystals is good for piercing DR but aside from that is rather boring and isn't going to be superior to a lot of the other weapons you could wield.
You want to pick your weapon type early to get access to Shatter Defenses in a timely manner, but unless you're a Sword Saint there's nothing stopping you from simply using another weapon in the meantime regardless of your Weapon Focus feat.
Martial proficiency gets you longsword and shortsword, Allslayer is one of the best off-handers and there are a couple of amazing longswords. That's what I'd go for, and in the meantime while waiting for the best in slot items to show up, you can use whatever best items you have since martial gives you proficiency in tons of weapons.