Thanks again all.
Very much agree with @Sprkslfly here. It looks like I’m moving into the realm of subjective personal preference now.
This has saved me from going out and buying another RDA (although I probably will anyway because I love gear lol) - and just getting the set up I like with the coils I like through experimentation. It’s been an education - at least I now know I’m not ‘doing it wrong’ so to speak!