@vt100, I think we’re a bit confused about what you’re trying to do. It sounds like what you want is 2 deliver to one groups receiving the same messages, so imagine two sets of consumers A and B with 3 consumers each. You want messages to be distributed like this:
Msg 1 goes to A1 and B1
Msg 2 goes to A2 and B2
Msg 3 goes to A3 and B3
Msg 4 goes to A1 and B1
etc.
Is that what you’re aiming for?