One can Power Attack with physical blast kinetic blade/whips. There's many posts with Mark Seifter confirming that I'm not gonna bother looking for a specific one while on my tablet, but my first post has a link where he explains using Power Attack with kinetic blade/whips that it'll be insane to think it still can't be used even if the post doesn't specifically state "Yes you can Power Attack with it".
If manifested as a light weapon, it can be finessed, and can use Power Attack for the usual -1 attack / +2 damage rate.
If manifested as a one-handed weapon, it can't be finessed and uses Strength modifier for attacks, but can be held in two hands for the two-handed -1 attack / +3 damage Power Attack rate.
I typically haven't found Power Attack that worthwhile. When you already do a lot of a damage per hit in higher levels, negatives to attack actually drop DPR significantly despite the damage boost. More worthwhile for devastating infusion with the static 1d8+Con (or 1.5xCon) blade damage and virtual full BAB though.
For kinetic fist, while I'm not a personal fan of the infusion, it can be useful if you wanna spam substance infusions on someone if you're able to TWF/flurry/got bunch of natural attacks. Mark threw out some number crunching to show how they can be useful if you're going for a build that utilizes its effectiveness.
Vital Strike was specifically called out not to work because it if wasn't, by the rules it would be legal to use with blade/whip. This occurred during the playtest to see how it went; it was subsequently made not a legal option except for devastating infusion when Occult Adventures came out.