I ran my car for a long time raised (only about an 1") above onroad height and had not issues with the CVs - I think that for normal onroad use you will get away with a 2" lift with onroad height selected.
Unfortunately the CVs are not the strongest and where experience here in Aust shows up them failing is when offroad, at high heights, steering right over and weight transfer to that side. With LLAMs I can lift my car to the equivalent of super extended height and when offroad I am very aware of this issue.
But if you are not going to heard offroad you should be OK. If you do go offroad, you will be Ok at offroad height and 2" lift and your big tyres) but if you get grounded and it automatically lifts I would be vary wary and keep the steering wheel straight.
Are you putting a winch in the bull bar and an ARB air locker in the front diff?