I just had a go with Super8 but to be able to use it the way I want, I'd need multiple instances that are each locked to the atom started by the first one of them. Also be able to switch between which are active output-wise. Other wise it is difficult to build up arrangements with mutiple parts live. I find that a single looper gets boring quickly.
I used to do this with Mobius inside REAPER a few years ago but I just checked again and it seems that Mobius doesn't work well in REAPER anymore. REAPER now squashes the Mobius UI into a corner.
I just reported as a bug.
http://forum.cockos.com/showthread.php?p=1715684