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I just recently made a dual wielding Soulknife, using the Gifted Blade archetype, and I am planning on going into the Dark Tempest Prestige Class, but I'm not sure how to build him. I hardly every make magic users, so I am not very experienced in building them. From what I've gathered, based off all the class abilities from the dark tempest, it's basically all about shooting off spells after a melee hit, more importantly, after a critical hit. Here's the feats and blade skills I plan on going with that to utilize the crit fishing style:
Two weapon fighting
Improved critical
Critical focus
Critical refocus
Empower power
Exploding Critical (B)

I'm also going to take the psicrystal affinity and expanded knowledge (share pain) feats because that combo is amazing for survivability.

Does anyone have any advice for my remaining feats, or feats I should replace?

In 3.5 Unearthed Arcana, there is a set of feats called Spelltouched Feats, and I was wondering if there is a Pathfinder equivalent? Specifically, the Live My Nightmare feat.
I want to make a Barbarian, raised and lives outside of civilization who has had zero interaction with magic and sees a traveling (evil) wizard. Spellbound (har har) he sees this and becomes obsessed with magic. He agrees to be experimented on by the wizard. Disaster ensures, naturally. But, in doing so, he now has the ability to cast spells and use magic, i.e. multiclass as a sorcerer, and also now has the Live My Nightmare spelltouched feat. Now, is there anything in Pathfinder that operates the same way as that feat, or am I stuck with making this character in a 3.5 game?