If your shock is leaking then it may not have any oil left in it, therefore no damping.
I would recommend replacing them anyway if they are leaking regardless of action, they have seen enough km's to not be at their best.

Live axles can be tweaked for camber/toe quit easily, even in the car. Just use a blowtorch and heat the housing tubes to cherry red on the side you want to "shrink", then quench with water soaked rags. Start off with a small patch and check the alignment after every adjustment.
Did this with an escort atlas housing to straighten it right up after copping a massive hit and bending pretty severely.