I use a vape but not the most knowledgable about them. That being said..

I use a Kangertech Sub Box Mini, like this one https://www.amazon.co.uk/KangerTech-.../dp/B00ZS4YINI

With regards to juices, you use 70/30% VG/PG mixtures for 0.5 (sub-ohm) coil vaping, and the opposite for 1.5ohm coils, so 70/30% PG/VG.

PG is the part that gives the throat hit, VG is the part that gives the cloud. You can also get juices in 60/40 etc.

I currently mix my own juices and it's much, much cheaper.

Hope this helps a little.

Any questions shoot me a PM.