How do you mean ‘dead’? I stuck a Black Box compression damper in a Rev XX and it did improve it but not in a chalk and cheese. dramatic way. I also have an RCT3 damper to go in them, but right now it’s sat in a coil U-Turn Sektor, where it seems pretty damn good.
The nice thing about the RS forks is that mostly they’re quite modular with the odd oddness – coil Sektors have a top-out spring on the rebound damper stack for example – so you can swap dampers with relative ease, you need to watch oil levels though. If you do decide to go for the RCT3 gubbins, talk to the nice Loco man for a good deal on it.