I strongly suggest lowering it every day, and parking for extended periods of time(including overnight) in access mode. The way the springs articulate is by folding over on themselves, this fold always being at the same spot wears out the rubber at that point over time. By it spending half of its time with the fold at a different section of rubber, you can effectively double the life of the spring.
I very much advocate this on the RR, as it has far more spring issues then the LR3, but the same holds true. Also, the compressors generally don't fail from normal use. They fail from overuse, and heat, which is caused by leaks in the system. The most common leak is from the dryer. Allowing the desiccant to cycle more can extend the life of it as well, and it will not break down as rapidly as when it is just sitting there, and only randomly, and when topping off the reservoir.
I fully agree with lowering it while still moving to not create tire/suspension binding. Once lowered, allow the compressor to run until it stops, to refill the reservoir.
It will still wake up to level itself out at access, but will actually lower itself(unless you have a leak) far less, as there is less air pressure to change in each spring.