Question about TRD lift kit + Deaver leaf packs

I want to get a TRD lift kit and put Deaver leaf packs in the rear. The TRD kit has a 1" block lift in the rear. Instead of the 1" block, I want to use Deaver leaf packs that will give me a 2" lift in back. The TRD kit gives a 2" lift in front. Am I asking for trouble by doing this?

Also -- the TRD kit comes with 4 shocks that are the equivalent of Bilstein 5100's. If I lift the rear by 2" with the leaf packs instead of 1" with the TRD kit, will I need different shocks in the rear? Will I need anything else? Different bumps maybe?

I would be grateful for any guidance you can give me.