Springs
Compression and rebound damping may control the action of the shock shaft, but the spring supports the weight of the rider and sled. This is why sag is so important. Sag is how far the shock settles under the weight of the snowmobile and rider. The formula between compression and rebound settings and valving only work if the right spring is used for the weight load. If your shocks are set up for a 160-pound rider and you weigh 225, adjusting the compression clickers won't fix your problem. You need stiffer springs. Or, if your sled has preload collars threaded onto the shock body, you can turn them to tighten or soften the preload of the shock spring. There is a fairly wide range of adjustment here, so use it. Ideally, the best thing to do is match your weight and riding style to the proper spring to begin with, but the easy fix is changing the preload adjuster.
There are steel springs (most common) and titanium springs. And there are air shocks, which use either compressed air or nitrogen to replace the coil spring, such as with the Fox Float and Walker Evans Air shocks. They are lighter thanks to not having a steel coil spring. And preload is easy to adjust by adding or decreasing air pressure with a hand pump (Fox Float) or changing the nitrogen pressure (Walker Evans Air).