Adding a RCX 4" next week, any suggestions?

I am adding a RCX 4" next week as the truck is finally paid off. Figured I'd better spend more money right? Anyway I currently have Bills set at 2.1 in the front and the rear has a 1.5 block with air-rite bags as I tow my enclosed trailer with dirt bikes all the time. I need some advice, will the N3 shocks be ok with their standard kit or will the cv axle angle upward with that? I really wanted a very slight downward cv angle as I believe I can bind more with the axle in the upward angle. I've seen a few pictures of 4" lifts with the cv's angled up. Should I just set my Bills at 1.4 or less, would that be better.
I am still looking for a spacer for the bags but wanted to do the measure after the lift is on to determine the correct spacer height

Also, anything else I should watch out for?

I have the same kit on mine and also have Bilsteins. I currently have my Bils set at 0 and have a decent amount of upward angle on my CV axel and also upper control arm. Upward angle as in wheel side of the control arm sits higher than frame side. With bils set at 1.4 it may be close to level.

Turned out okay but the rear is way tail high. I have the air rite 5000 bags in the rear and the only option was a 4" spacer. That with only a 3" spacer for the rear spring doesn't equal out. Need to cut down the bag spacer an inch.