You obviously got one of the cheap digital boxes, because you say you were using it at 365. The reality is, you don't know what temp you're vaping at by looking at that display. You can't get accuracy anywhere near that price. Play with it until your remains are brown, not green or black, then use the number on display as a reference.

A decent vape will require less herb than with smoking. That's the consensus from many users. Some people use vapes specifically for that reason. You should hold your hits longer with vapor though, since it's not as readily absorbed as the THC in smoke. Holding vapor hits is fairly easy and safe, compared to smoke, so it's no biggie.