If you can do without the color screen, I'd definitely recommend the VT inbox v3 as backup. I guess the Aurora is the follow up to the Inbox but, between the two, I prefer the Inbox. Maybe it's just me but I always have a back up mod and a back up atomizer around. It's hard enough to find the vaping products you like with the huge selection out there much less replace them immediately when lost, stolen, or broken. It's fairly cheap compared to other regulated mods out there and rock solid.
My Inbox used to be my main. Looked at replacing with the Aurora, at first, but ended up with a Spade 75C which I absolutely love. The Inbox is now my main backup or just something to have when I want to experiment with a build.
If you can find them, and can use an unregulated mod, the eleaf pico squeeze (not version 2) was my go to on-the-go mod, and designated last-resort mod due to it's ease of use, size (the wismec luxotic bottles are good replacements for the stock), and price. I also use this when I'll be in a questionable environment and don't want to risk my expensive mods.
Maybe all this backup talk is silly but I really can't stand the idea of not having a suitable vape available if my primary device is down or unavailable due to cleaning/rebuilding.