Let me correct that for you... A 30 watt is perfectly fine for rda's.
What do you think people were using prior to the 40, 50, 100, 150 watt mods? Oh I know yeah it was 30 watt mods among others. I also run rda's on a 30 watt. And before you say anything I also own a v2 hexohm so I'm not just...