Let me add to my post in that thread.
Glass, especially if there is glossy texture of any kind behind it, means you will have to use polarizing filters on the lights and on the lens. It critical that you get the gel on the light in the same orientation. I have mine in frames that are marked to ensure they are both oriented properly when put on the lights.
Also, shoot a color checker once you have the light within 1/3 or less a tenth is ideal at all four corners and the center of the piece. Best way to get even lighting is to move the lights farther back so the center half of the cone is covering the entire piece.
I'd try to get the lights a little more oblique than 45* just to minimize hot spots on the frames. Or at least get the hot spot along the outer edge of the frame.
If the art is matted inside the frame then move in and eliminate the frame. The objective is to document the art not the frame.
Given your equipment list, I expect that you will be using the 7D and 24-70. The 50 is another option but means moving the camera for every piece to get it as large as possible in the frame.
The 100Ws lights are going to be a limitation. To get down to F8, especially with a polarizing filter, which is almost a necessity as you describe the situation, you are going to have to use a fairly high ISO. That's a compromise.