if you have a straight centerlink there's no need to worry about it rolling, so nix the DHD brace (which prolly wouldn't fit anyway).
The Kryptonite is good, but still rolls and the Rare parts alone will NOT stop it if you have good power and a lot of weight.
My current setup seems rock solid:
Kryptonite centerlink and tie rods
Kryptonite large welded gusset
Rare pitman -- which I would NOT buy again. Get a Moog or other.
Ultimate Idler Arm - out of business, so pick another.
Henderson idler
DHD brace
DHD lower control arm connecting bracket
She turns and handles way better than my old 1.5" straight centerlink! To do it again, I'd mirror the above, but wait and see how it was with the stock centerlink before buying the Kryptonite; it may not be needed!