You mention the six again era and that caught my eye. I have suggested that with 6 agains we can and have had 12+ tackle sets and asked the question, what's the big deal if a team concedes a 7 tackle set?
If I was coaching

a team I'd tell them to kick for the ingoal even and especially when still in our own half. If it goes dead, no big deal. Against the elite teams it would be a nullifying device.
If you can picture this. Melbourne defending, us attacking and still behind our own 40 metre line, 5th tackle. Deliberate slow ptb to ensure our long punter is ready and correctly placed, ball passed straight back, (grid iron style if we wanted but I know, unnecessary) our boy kicks long, low and hard looking for the dead ball line.
If you can picture such a scenario you might also see a few positives. In this scenario against Melbourne I think it might be useful for these reasons.
Melbourne have to be onside for a restart so the entire team has to get back down field.
We must make the 30, them the 20.
We are set and uniform, no gaps.
We take away their backfield yardage gains.
We gain a short breather.
It costs just one extra tackle. Thoughts?