A real coilover setup instead of sleeves.
These always offer the best ride, having a shock specifically tuned for the spring (bound, rebound, spring rates, all work together)
vs a sleeves that can fit any shock, and offer a hodge podge of variables most likely not working together make s me weiry.
I would not do a sleeve like ground control or skunk
I would go with a good lowering spring like Eibach prokit or Neuspeed sport, mates to Bilsteins, Koni yellow, or the KYB AGX or Tokico Illumina.