Look I don't want to turn this into an argument, but theres just a few things that raised some flags. All I'm saying is that I (as in my opinion) would talk/do some more research before calling it a plan, however I'm the type to triple check most of my decisions. I don't expect you to listen to me %100 but that maybe I would raise some points that would maybe get you to think about it. I'm not saying there is a right or wrong, just that it is a modification worth looking into before making any decisions
The more I read into these the more I keep seeing more advice that is for it. I do distinctly remember people like David Pozzi and such saying that it was not necessary/ and can be very tricky to get right and not have any downsides. From what it sounds like, you could use one just to keep your tires from rubbing. I don't think that it will be so signifigant that it will really be all that much of an upgrade besides the tire rubbing issue. I have my tires pretty far out and didn't have any rubbing issues with my del-a-lums in hard turns for the short time I drove my car. But obviously everyones is different.
You have global west leaves, slide-allinks- and soon to be Watts link. Sounds a little overcomplicated and from the surface appears you are just throwing a lot of parts at it hoping to get something better than a leafspring suspension. You seem pretty set in your ways and already have all the answers so I hope it works out for you
If you decide to pull the trigger, please report back it may be a good solution to a problem that some people might be having