Comparing a car that was built to be on the dyno / trashed at a drift meet cant be compared to a normal street car. If u drive it like u stole it of course it will break something eventually...
As for more than 600 Nm driveline troubles....Which part do u think will break first, the balanced motor, the OS twin plate, the r33 gearbox, the single piece tailshaft or the diff (which can be replaced with a 2 way for $500) on my setup. If the axles go, well replace the rear cradle with a GTR item.