I only have about 30 hours on a snowbike, but I have messed with strut length. Strut length will affect weight balance front to rear. Longer puts more weight on the ski, shorter puts more on the track. There are 2 different ways I've seen to measure where you're at. The first is fork leg angle, and those who work with that say to keep it between 58-62 degrees. Put an app on your phone that can measure that and you'll have a solid measurement to go off of. The second school of though is to pick up the back end of your bike, and as you set it down, the whole track should evenly contact the ground.
You do want to find the sweet spot, and the front has been what determines that for me. Too much on the front makes steering heavy and makes the fork bottom too easily. Too much on the rear makes the front wash out in turns.
Back to what you're trying to achieve though, weight transfer. Strut length will affect your baseline weight transfer. That is to say, it will transfer weight fore or aft depending on how it's adjusted, and that will be your baseline weight balance. Softening the rear skid shock will increase transfer in the traditional snowmobile sense.