with a rda? i dont know -- our local "the dna40 can do no wrong" crew blamed it on my use in a dripper with nearly pure vg -- i did try cutting it with pg and got far fewer "temp protection" messages.
Yep, use RDA's nearly exclusively.
I supposed its entirely possible that running a max VG juice MAY require turning the temp up a bit, but that said, the few times i run other juices (usually ~50/50) i run the same temp setting as max VG juice.
I'm almost always around 440-450, but that may be high compared to most, as i use a veritas which naturally has a bit longer coil legs, which i'm sure slightly skews the temps needed higher.
I love my first batch DNA40, and have had very few issues with it, but i'm definitely not in the "Evolv can do no wrong" camp...lol