awd,
Before you start thinking of reaching for the sky, my question would be what are you going to use it for? And what size tires will you be putting on your X to accomplish your goals?
Most 6" coils (like skyjacker pt#136) tend to settle out at about 5-5.5" of actual lift, and the coil seat spacers make up for it, which is needed if you slap a winch on the front and/or some armor. IMHO, 6" is more than just about anyone would ever need, as with that on mine I can do just about anything here in CO, and that's with open diff's. I'd be worried about getting the CG too tall to handle any off camber situations with more lift, and the steering for the TTB axle gets kinda freaky too.
Also, what ttb drop brackets do you have? (and could you post pics?) I just swapped my drop brackets out b/c they were janky and fractured (I went cheap and stupid, and almost died for it). Again, imho, the only brackets that I trust are the Skyjacker ones, which are beyond overbuilt, and the same can be said for their extended radius arms. James Duff makes a damned nice TTB kit as well, and they are just finishing up fabricating a SAS out of a box kit for the 1st gens as well.