I use a 50w ileaf "istick" with the aspire nautilus mini. I get my vape liquid from a site called Vape Club, great delivery, and the prices arent bad!
I vape at 4 volts aka 8.4w, and I smoke the brand suicide bunny: suckerpunch, which is 60VG (higher VG gives you more cloud) and 40PG ( PG is like the strength, what sort of hit you will get from it)
All I can say about my boxmod, there seems to be a lot of people that get problems with the charging port, it can break quite easily. I am infact having some issues, but I have been assured the 20 and 30w versions don't have that problem. Also, I would say with the nautilus mini, upgrade it to a tank with a metal casing, because the glass if double threaded or made too tight, can chatter. But I upgraded to a metal cased tank and have no problems what so ever!