Try the airbags first since they're there. It’s free.
May be the angle of the pic but those springs look a little sacked out.
Again, airbags to the rescue. Air them up, see how much more tippy it feels and then decide pressure vs ride quality vs height.
Then if you get that thing up a few inches and it’s too top heavy feeling, a sway bar will help that.
Personally, not worth putting a pile Of money into the back of an old RV for a couple inches ground clearance. You don’t “want” it considerably higher anyways. It’s not a hot rod, it’s a RV. Should be close to level.