I would ask that instead of answering that myself, you talk toa forum member who is part of a large group of no nic vapers. His name is Sun Vaporer, and he is well versed in No nic usage.
I think that once you reach the no nic level everything becomes personal preference. I know that vaping the fluids straight is possible, is it necessary if you can cut it not lose the flavor and make it last longer? Sun I believe would know the answers to those direct questions.
Ro