I recently discovered that Light Table REPL works with ClojureScript without the need for any specific setup in your project. All you need is the lein-cljsbuild plugin to run the incremental compiler and follow the steps below:
lein cljsbuild auto
lein ring server
I tried other ClojureScript REPL setups before and I always found the process extremely fiddly, with Light Table everything just worked out of the box. I definitely recommend giving it a shot if you haven't yet, especially if you're working with ClojureScript.