I mix my juices to work for me. Always wonderful when others like them, but I use a Taifun GT, pretty much a better Kayfun RTA, with better vapor, flavor and ease of filling. YMMV. I rarely use RDA drippers, and I would certainly change my mixes if I was doing so. The additional heat affects the flavor, vapor, nicotine, and throat hit, all in different ways, depending upon device, chamber size, air flow controls, wicking, etc. That's pretty much why we have to make our own....DIY, to tailor it to your uses. 
You almost have to throw out all rules of thumb to get the 
juice to work with your specific gear. Melons are not fruit......to me, LOL. I like my citrus....those are fruits....to me. 

 As such, I have no suggestions about how to make them good. Is that even possible? 
 
  
Fruits require creams, vanillas and sweeteners to bring out their full flavoring, and to dampen the chemical/floral flavorings. These supporting flavors, each at 6% or less, will not dominate the flavor mix, but will enhance and cause the fruits to pop, and not disappear over time....quite the opposite. That has been my experience. Of course, I'm not talking about melons. No idea how to get them to work, as they are a different flavoring branch entirely from my precious citrus flavors. 
 
Before anyone jumps me, I am jesting about the melons not being fruits. Certainly they are. I was not jesting about not liking them, and I would never, never, never vape them......until I do! 
 
I have a few blogs about how to mix fruits with supporting flavors that can help you make great 
juice. It's not that hard. As always, taste is subjective, so my ideas need to be adjusted to work with your taste sensibilities, that's what being a good 
juice maker is all about. Live and learn. 
 
  
