Need some advice about shockers, valving and so on.

The Patrol has a 3" lift with all suspension components sized to work with a lift of that size.

Problem is, on road, normal country driving, unloaded, when we hit a bump, the thing just goes straight up, it's like there's no absorption of the bump at all. I do have adjustable shocks which I have set stiffer, but if I don't have them set stiffer, the thing just seems to wallow all the time, like a ship at sea.

Should I be looking at shocks or coils to fix this?

Can I get shocks revalved so they are more absorbant or is it just something I have to put up with?

Thanks for any help.