So there are those modifiers where you can use a triflash bracket to create a large modifier.
Normally you need for each of these radio triggers.
I wonder if it is possible to have only one radio trigger, the others an optical slave? Since it is inside the modifier, it should have no problem recognizing the initial impulse from the trigger on the radio.
Although I somehow have my doubts, the light output could be more like a speed light and then two speed light …