Boo,

Reverb and harmony together should not be any problem. It sounds to me that you may not be hooked up the best way. Reverb needs a clean signal to reference against. If there is no original signal mixed in with the delayed signal there will be no reverb.

I would take the signal from the effects out from your RMS and sent it into your Nanoverb. Then take the signal out from the Nanoverb and send it into your RMS through the effects in. Your mixer should have a knob for the amount of the effect you desire.

That is how I would do it. Good luck.

Tom