Air shocks in general are to (make up) for a weak rear suspension on
cars and trucks .Back in the 70s ,we loved Gabriel high jacker air shocks on our older mustangs and camaros ,the result was a harsh rough ride ,but we could get those Firestone Super sport tires under the back wheel wells and the air shocks rigidness would keep the wheel wells from ripping up the sides of the tires as the suspension moved .They do put the strain on the shock mounts
but they didn't break too often ,(i never had one break) but its not the way to do it thats the point ,and if you put them on a trailer with verticle shocks
they will give the trailer a rough ride and thats no good .so a good set of shocks is good ,you don't need gas shocks ,the idea is to control the
tire/wheel rebound ,you don't want a stiffer shock ,gas shocks will be stiffer.
No question ,a high quality hydraulic shock will be fine .