It's funny what can produce the best combinations. This week I got my first Provari and I got a Smok Zmax about a month ago. I will use any tank on the Zmax but so far I have only used a Kanger aero on the Provari. Why? Because they are the only tanks I have that do not leak to some degree.

As much as I hate to say I love a Smok product I LOVE my Zmax. So far (using the same tank) I cannot get my Provari to produce the same flavor as the Zmax but the Provari and I are still getting to know each other. Obviously the Provari is not an inferior product to the Zmax but every combination of device, fluid, tank and settings produces different results.
Honestly the best and most flavorful vape I have ever had was on a cheap Smok Aro winder battery, a vivi nova slim tank and Madvapes Sweet Carolina juice. $25 total investment in hardware. It was (and still is) an amazing combination for me. However I will not put a vivi nova on my Provari because I do not want to put a tank that leaks on it and every vivi nova I have used leaks. But I have no problem putting it on a device I can replace for $20. I know it will not hurt the Provari but if that is the flavor I am looking for I do not have to use the Provari and I will just use the Smok.
All in all there are not any "perfect" combinations for me since there are almost unlimited things to try. There will always be a tradeoff. Find you like and go for it. Cheap, expensive, regulated, unregulated, purchased coils, build your own - whatever. As long as it works for you and you do it safely - VAPE ON!