Several years ago I managed to quit smoking with the help of vaping. My favourite was an innokin cool fire. I always had to use fairly high ohm coils and with lower coils it was way too harsh. Then it broke - I bought a kanger battery that even with higher coils, I couldn't manage. Ended up going back to smoking like an idiot.
I'm now looking for a new vape that's adjustable but most now appear to be sub-ohm which doesn't seem like a good idea for me!
I've been using a mini triton for yonks now, it's my absolute favourite tank (and I've tried many tanks!). Not so easy to get but uses nautilus or mini triton coils and is top filling which is so much easier than the original mini nautilus.
Any variable battery will do, all will go low enough to deal with non sub ohm vaping (called mouth to lung vaping).