So if you want to stay close to stock AS gives you a big advantage, but it also means you have no choice but to stay close to stock.
But do you need to put 33/35" tires on a LR3? In many cases, a close-to-stock air suspension Rover will be more capable than a modified solid axle Rover, so unless your goal is to crawl over large boulders there isn't much advantage. There will be other tradeoffs, but as I spend more time in the driver's seat of newer models I'm gaining a deeper understanding of what they can do. The versatility and capability is extensive.