My experience has been that you can help the vocals sit well if they are processed by the same plugins as the RTs. So, if you have a Aux track with your reverb plugin, bus RTs and vocals to that. Also, on your master fader you can put a bus compressor plugin (SSL by Waves or UAD or something similar) and a mastering plugin (Ozone or something similar). I think this usually works quite well. Good luck. Take care. Greg