Add air bags or air shocks to level trailer???

If you add air shocks, how much weight are the shock mounts designed to carry? If you extend the shock to raise a side of the RV you will be taking the weight off the suspension and putting it on the shock mounts.

A company used to sell air bags that went under the tires on the low side. The company has been out of business for a while but some on here made their own air bag levelers from salvage fire hose.