In these forums, several users are very active, who use Reaper for Live playing as Keyboarders, Guitarists, Wind Controller users or DJs.
One keyword for finding appropriate messages in the forums search is "LiveConfigs" and might (or might not) come up with message threads that could be interesting for you.
Unfortunately there is (still) no dedicated subforum for Live users of Reaper. (Edit: now we are in it
)
-Michael (Keyboarder, very happily using Reaper as an extremely sophisticated sound engine)