Put heavy winches on both the front and back, That might soften it a little!
Is it riding really bouncy, or is the Jeep slamming on every bump? If it is bouncy, stiffer shocks will help, but I would wait because some settling will help this. If it's just simply wrenching your jeep every time you hit a bump, your springs aren't moving/flexing enough and softer shocks could help (as Bounty said), also, how much air do you have in those 33's? Taking them down to 32psi could help a little if you have them pumped up too high.
My stock springs were just about frozen stiff. It felt like the only shock absorbtion came from my tires, and when I put my lift on, I thought I had died and gone to heaven!