Try increasing the compression. It should bottom out on the biggest jumps or you are not using all the suspension effectively.
Too much compression can affect the bike's ability over smaller
bumps and terrain. If it is too rough you need to decrease the compression. If the shocks are worn you may need replacments
or fresh springs. Going too heavy on springs will affect your average
handling when not on jumps but too soft on suspension makes the bike less controllable. Too much rebound can make a bike jumpy
as the suspension fails to return quick enough.
In your case I would try extra compression but just enough so it still bottoms out on the bigger jumps. This gives you full suspension travel.
If you can't get that to work some new shocks might be in order
or possibly some shims to support sagging springs if cost is a concern.
Same applies to front, more compression or spring increase.
Re-valving is more about rebound control and dampening for rough sections, keeps the wheel on the ground and not sliding out in corners.
Suspension has to be a balance, not too harsh or soft.