Some folks, not saying yer one of them, tend to get caught up in the numbers and what voltage they think they "should" be at. The Provari ( and other bigger VV devices) are a different device and you might end up really liking a setting that you wouldnt have expected on an ego....maybe not.
Pre-Provari I only had a 6v unregulated mechanical mod and only ever used 3.5ohm atomizers and I just new that would always be my setup........then I got the Provari. So, went ahead and used a 3.5ohm atomizer and cranked that sucker up to 6v and man did it work, it worked too well.But then my atomizer would start to go out (increased resistance) and I was already at 6v and couldn't adjust.
I now find that my preferred vape is an atomizer in the 2ohm (sometimes lower) range at about 4 - 5+ volts(depending on my mood). I never ever thought I would like that type of setup.
Point is there are so many variable not related to the device itself (draw style, preferred hit, vapor requirement, nic level.....etc) that suggestions can be made but only you can decide what you like. Sounds like you got yerself a sweet spot.