If you're looking for higher nicotine blends, focus on those blends that are based on burley and/or those that contain perique. (Sorry, it's been ages since I've been familiar with Lane's offerings, so I can't offer any educated specifics.)
You could also pick up a tin of blending perique and add a couple of pinches to anything you're wanting to spice up.
I'm assuming you're asking about Lane Limited blends because they're easily available in bulk. But maybe you should consider Stokkebye too. Their Luxury Bullseye Flake is a very good blend that includes perique and offers a bit more strength. They likely have others that I'm just not familiar with.
Bob