@BabyFacedFinster: I wouldn't go over 7.5 with flowers in my nano, even with added oil. I would say 8 is the max limit, but don't use a slow draw speed at that high of a temperature. When I mix oil and flowers I keep it at my normal level for flowers, or maybe .25-.5 higher. For me that means anywhere from 6.5, my normal, to 7.
@bussinrounds: I actually prefer using concentrates with my E-Nano, above all other vaporizers (even Evo with quartz nail), and even dabbing itself. The simple reason is flavor.
Granted, I'm not an expert in dabbing but I've never managed to get the same flavor as consistently with any other device than my nano.
I've used organic cotton and degummed hemp fiber and prefer cotton because it is less messy and basically foolproof in my experience. Hemp has a slight edge when it comes to flavor, you can't really taste the cotton, but it seems to absorb a tiny bit more terps than hemp. It still tastes better than other options I've tried. I've used nearly all consistencies successfully with cotton; crumble, rosin, shatter, sugary live resin, honey-like distillate, pretty much anything I can get my hands on I've tried and it works great in the nano. Really runny stuff is the only thing I haven't tried, but I would think it would still work well with cotton.
I've tried cartridges but they're a bit weak and not as flavorful as a good oil.
To be fair I haven't tried any of the more recent concentrate pens. They might be a viable option, and are definitely useful on the go. If you don't need the portability though it might not be worth spending money on. The nano is more than enough to get you by. Every time I try a new device to try and improve on my concentrate usage over the nano I am disappointed. If your main concern is flavor than you're probably going to have to get a nice e-nail controller with a Sapphire insert, or at least SiC, to beat the nano in that department.
I usually use 7-7.5 on the dial for oil in organic cotton. Lower temps give better, longer lasting flavor. Higher temps give bigger, more dab-like hits. That's the area that other options like dabbing, pens, the Evo nails, etc. excel over the Nano in my opinion.
If you don't care about flavor and want the biggest hit possible you will want something else to use with concentrates. In my opinion, if a top shelf flower hit is a 5 on a scale of 1-10 in regards to strength, and a big dab is a 10, a convection oil hit is around a 7-8 depending on the temps used. That's plenty enough for me most of the time.