The point I was initially trying to make is that it isn't a good idea to vape high-nicotine salts in sub-ohm tanks. You ingest entirely too much nicotine that way and can get very sick.
I don't know of any devices designed specifically for salt nic that give the vaping experience of sub-ohm tanks or DTL RTAs/RDAs. If what you want is that voluminous vapor and big flavor experience, the amount of nicotine in your liquid needs to be reduced.
And as
@gsmit1 said, with sub-ohm tanks you could very well end up with a more pleasant vaping experience by using freebase nic rather than salts.
What you shouldn't do, at least in my opinion, is put 35mg or 50mg salt nic into a sub-ohm tank and vape it at 75 watts or more. The two just aren't safe to use together. In my own experience, just vaping at high watts with my 6mg freebase nicotine, I can get a head rush and tachycardia, and I really should reduce my nic level to 3mg.
And apparently somewhere along the way, as MMM quoted, the OP made the statement "nicotine is nicotine," which just shows the lack of understanding that precipitated the question in the first place. The reason freebase nicotine is treated to make salts is so that when vaping 50mg nicotine, those salts don't trash a person's throat, whereas freebase nic would. But salts can still make you sick as a dog if you take in too much, too quickly.