May I ask your reasoning for wanting 70W (and not more) and why parallel?
I can think of a few mods that have magnetic doors, dual 18650s, but they can put out more than 70W (but can also be set at 70W).
I have a sigelei 150W, it has dual 18650s, magnetic battery door, and I can't say for sure but it appears to be wired in series. (it can go from 10W to 150W) it has excellent battery life. I have been very happy with it. Sigelei also makes one called the 100W plus, it is very similar but it looks a little different, only goes up to 100W, and is a little cheaper. But it does have a magnetic battery door and dual 18650s