I looked at the pics, which takes me a while on dial-up, totally hate the way we have to post them now. I agree that it's classic nute burn.
You know what to do, flush the affected plants, next watering after that just ph'd water, then back to feeding with less nutes. Obviously, do a reduction in your other girls too. They may not be showing issues yet, but why push them to the limit, it only causes stress.
Edited to say that if it is the borg, and they've done that much damage already, it's an infestation that's been working for awhile and you're going to have a huge battle on your hands. Usually they work from the bottom up, they hate the light and tend to stay low on the plant at first to avoid it. You don't normally see damage up top unless they've been there for awhile, IME.