I use DIY nic salts all the time in MTL devices. Mostly, as has been said match the nicotine level to the device like you would do period, and I've certainly vaped my 18 mg.ml nic salts slightly below 1.0 and certainly above that resistance.
The whole pod mod/nic salts thing is a marketing gimmick. You don't need to vape nic salts in a pod mod, otherwise pod mods would not have EXISTED before nicotine salts, which is factually untrue.
I hate (false) advertising.
Some nic salts seem a bit more bioavailable, some reports are they are equal or less. It may have SOMETHING to do with the forumation, because I have not noticed any key differences in nic salt juices, although my son gave me a hit off a Juul recently. It definitely did something weird, and something perhaps a LITTLE bit too NICE.
So if I got a pod mod, it would probably be the Juul but I don't actually NEED 50 mg/ml per puff, so I'm not going to .Perhaps look out for nic overload but really I wouldn't necessarily be insanely worried about THAT even, to be honest, but it's probably a good idea to say, so I'm going to say it. "Be on the lookout for nic overload, even though it probably won't happen, or if it does, it will just be unpleasant for a bit, put the vape down, etc."
Best of luck,
Anna