So, the top half of my plant is about a week from ...

It's normal for the heavily light saturated areas to appear done sooner and there are many partial harvest methods, whether the top is finished first or the sides and the the center needs maturing. I think you're safe to do it in phases, but you'll want to protect the areas that have been cut so that the openings don't get diseased or debris etc in them. Whether you seal up the cuts or place tape over them,I think its smart to at least do something to the cut branches. Happy harvesting, the buds are looking beautiful. ✌️

For sure. Its a good possability to harvest. you dont have to be concerned of shocking her ( she will be cut at all)

Many growers do just that, harvest in stages. You harvest the part that's ready and give the rest another week or two.