Monroe air shocks

Been using Gabriel Highjackers since 1974, not to prop up springs that won't hold the car where I want it, but to keep the car at the correct stance when it has a big load. Never had the problems that you describe. What I don't get is why the car doesn't rise until you put 80 psi in the system. It should move the car with 25 or 30 psi.

His air shocks are probably fighting the bind in the bushings or arch of the spring because it needs to be so high...

The right solution is the proper springs. Trying to do it with load assist springs is going to remain a constant disappointment.

The shocks probably don't leak in water because there's no load on them with the shaft at the same height too.

Want more pressure? Get a regulator and a nitrogen tank. If that don't do it, nothing will.