Invunerable Rager / Thunder and Fang Style - Too Feat Starved?

Fellow Pathfinder enthusiasts, I could definitely use your help with my tweak to the invulnerable rager build. As you can see below, I am taking the typical build and trying to add in the Thunder and Fang feat from Varisia - Birthplace of Legends. My character concept is to be a Shoanti of the Shriikirri-Quah who has traveled all the way to Absolam to join the Pathfinder Society. This character is NOT intended to be played in society, but rather likely to be my character for a Shattered Star campaign. I am free to use pretty much whatever from official Paizo sources. This is what I've got.

My concerns are the delay in getting Power Attack and the delay of rage power progression by taking the Thunder and Fang feat, but I love both the concept of the feat as well as being able to keep the shield bonus when making and attack with the Klar. Optimization is not of the greatest importance as long as I get the idea to work well enough.

Please, let me know your opinions and/or suggestions on making this work.

Thanks in advanced!

Why not Titan Mauler?

You wield the weapons you want, without a massive feat investment.

Hmm, I think he's pretty good.
He's feat heavy, not a lot of room for maneuvering, but overall seems solid on the feat side.
Greater Beast Totem might come into play a bit later. Isn't it based off of Barbarian level and not character level? If that's the case, I'd say get Reckless Abandon earlier so you can combine it with TWF and Power Attack.

Why not Titan Mauler?

You wield the weapons you want, without a massive feat investment.

For the insane damage resistance, man!

Hmm, I think he's pretty good.

He's feat heavy, not a lot of room for maneuvering, but overall seems solid on the feat side.
Greater Beast Totem might come into play a bit later. Isn't it based off of Barbarian level and not character level? If that's the case, I'd say get Reckless Abandon earlier so you can combine it with TWF and Power Attack.

Yeah, requires Barbarian level 10. So the earliest I can take it is at level 12 where I have it.

You have a point about Reckless Abandon. I suppose I will just move it up after Superstition and push lesser beast totem and beast totem back a tad. Its effectively just natural armor. Not likely to be using claws unless I am disarmed for some reason.

You should also take Flesh Wound instead of a increased DR rage power.

I really think you're better off just sword n' boarding or two handing it. All you're really getting out of it is an off hand attack and a -2 penalty to all your attacks and a big damage decrease from str&1/2 from your main hand.

If you're sword n' boarding, 1d8 isn't that big of a decrease from 2d6. You'll do slightly less damage, but you'll do that slighty less damage 10% more often because you're not dealing with that -2 from twf.

If you really want to use a giant hammer in one hand though you could always go alchemist 2 and get a tentacle or extra arm. If you do the tentacle thing just say its integrated in your first arm so you have a sweet mutant arm. Then you get to use a shield AND have str and a half. Also a bunch of cool alchemist stuff.