If it help, this shot I took from a few page back is pretty close to being equidistant from both towers. Since it's a week ago, you can imagine it with one additional floor on top. The core is probably at the same level or above the Skywalk.
I'm pretty sure this is topped out in terms of floors and core. Appears to be 32 floors above the mechanical level. And the schematics in the PNF showed 32 floors above mech plus about two additional core stories.
So they only thing we are waiting on now is glass to catch up.