Somewhat tongue in cheek, it all appears to me to be an inefficient method of delivering LGBs by using two expensive aircraft.
How about fitting a big long rack in the back of a Herc, and filling it with LGBs (think about images of WW2 destroyers and depth charges). The Herc then pootles around the area of choice at altitude, waiting for a designator aircraft to find a target. The designator aircraft marls the target, the Herc flies over at great altitude and they roll a bomb out of the back and into the basket!
Allegedly the precedent was set during the Falklands when dumb bombs were dropped by a similar method. Think of the benefits, loiter time on a Herc is considerably greater than the designator aircraft, so you can put one up and sortie the designators. Also the number of LGBs the Herc could carry would be greater than any other single aircraft.
Only one drawback, we don't have any spare Hercs!
Hang on, what's that black car pulling up outside my house.......