I was just seeing if this was normal or just me. I find that the same ohm cartomizer I am having to use a lower voltage then on my other mods. Like on a 1.8 carto I can set the Provari at like 3.5 and its fine...any higher and I get a burning taste. I thought at first it was the carto but I tried a new one and it did the same thing.
If I use 1.8Ω I set the ProVari lower. You said at 3.5V it's fine, so what's the problem? 1.8Ω at 3.8v is 6.8w, which for me is just about right for some of my delicate juices. What battery device and topper you use often makes a difference. On the ProVari I vape my favorite juice at 7.2w to 8w, depending on the topper, but I vape the same juice on the Reo at 13.5w to 10.5w (depending on how much the battery has discharged), but I'm going to make my next coil lower, since I still want more heat.