the issue you'd probably have with a 224" softbox and a speedlight is that it won't actually act like a 224" in softbox, because the speedlight can't really spread that much. You'd be better off with a smaller softbox and just having it farther away.
1) fill is a bit harsh, which killed any depth to her skin. Small bush on the right fully in focus is a distracting element. You could have fixed this, and given a better composition by shifting the frame to the photographer's left, to get more stream and also give her body a place to 'go' by having her at the 1/3rd power line on the right of the frame.
2) not as sure about the crop here. Seems to be a lot of dead space above her head and her knees are sort of awkward just having the kneecaps. Also, I feel like it sort of accentuates the fact that her eyes aren't as symmetrical. WIth girls with slightly less than symmetrical eyes, I tend to want them to always have at least a small bit of head turn one way or the other. That would then push attention away from the angles at her eyes, towards the clarity of her eyes and smile, which are both stunning. Exposure is nearly perfect.
3) Great shot, but you need just a bit more DoF so that her teeth aren't out of focus. Also, just go ahead and photoshop the wrinkles under her eyes. her mascara is really clumpy, but I guess you couldn't do much about that yourself.
4) Technically a good shot, but I don't think looking straight forward dead into the camera is a good look for her for the reasons above. Not 100% sure why this was landscape mode, though it doesn't work terribly as such.
5) love the pose, too much fill
6) This one doesn't seem to have any reason why its landscape, and I think it just serves to de-emphasize the subject here, with no tangible benefit. I'm not anti landscape poses for portraits, I just think you have to have a good reason for doing it. And 'just wanted it different' isn't really a good reason. Pose seems a tiny bit stiff, and again, her eyes head on isn't a great look for her. The lighting is PERFECT though.