I'd always fit them when lifting a freelander, sometimes even 2 sets. As often everything is thown out of sync.
The best thing you can do is fit a set on the front, take your freelander for a proper 4 wheel alignment test, ideally somewhere that has a good knolwedge of 4x4's.
They will be able to align everything back to factory standards, keeping the handling as it should be.
They may recomend to fit additional camber pins, I.e Rears, depending on the size of the lift and how far the alignment is out by.
Whilst lifting greatly improves ground clearance and is well worth doing, without a 4 wheel alignment your freelander will develop the handling of a Relient Robin.
It is a costly process going down this route, but worth it in the long run.
Phil