I would have thought 160w is possibly a bit excessive. As a general rule of thumb, I vape at around 4-4.2v, for any build I have. I have just coiled my limitless tank, comes in about 0.22 ohms. Using it at 75w, my regulated device tells me I'm putting 4.06v through it. Everyone differs as to what they prefer, but 160w would prob want a build at about 0.1ohms.
I never build that low. Unless you know your ohms law inside out and are brushed up on your battery knowledge I wouldn't recommend building so low either. [emoji848]