2014 LIMITED DCLB 4x4 - pulling the trigger

Ok so I’ve researched the cra* out of the suspension section on our site. I’ve a 2014 DCLB 4x4. I’ve just turned 70k miles. I want to go 2.5” lift and have it drive better than this nose-diving stock set up. My off-road time is limited to mostly fire trails, fishing spots and the like. I do mostly highway driving.
Thinking of: Billstein 5100’s front and rear. JBA upper control arms.
What I don’t know is:
Should I keep my stock springs?
Do I need to install an add a leaf?
I don’t carry a lot of rear weight most the time. Just hauling trash to the dump or occasionally a bed full of stuff going to the dump. Just looking for some insight based on experience.

 

I’ve a question. Some sites are recommending the 887 springs for the Bilstein 5100’s. I thought after all the reading I’ve done on Thai that the 887’s where hood of you have more weight up front, which I do not. Anyone able to comment on this?