I guess thats one way to replace mounts for a live rear axle!
Motorsport is like sex. You could take it to track and have a long, enjoyable session, or you could take it to the strip and get it over with in less than 20 seconds.
That is uuuuugly. A single 3.0 on each corner would have given a considerably better damp and probably overkill for whatever he's using it for.
Multiple shocks these days are pretty much dead. Unless you want to run more than one bypass and are forced to go external. Then its your bypass shock and a spring carrying shock. Even Rod Millens "hillclimb" truck is a single shock per corner machine.
The answer is Helmholtz!
Toyota ST185 Celica Rally.
Toyota ST205 Celica Rally.
Jimco/ Cosworth 350z Offroader - 609whp at 16psi
For a 4wd its not unusual to run dual shocks on each side for the pounding they can get offroad, and the 3 extra on top of the diff to dampen axel wrap is an interesting idea, however in that thing, there is most likely no point