Well, I'm sure you already knew this since you know battery safety, Ohm's law, blah blah, that you're already pumping 35 watts based on dual coil ~ 1.0/2 = .5...with fully charged mnke battery, so you could either
go lower in resistance with lower gauge wire... or
save up for box mod that hits higher watts with right build plus longer battery life etc...
Budget box
https://www.youtube.com/watch?v=_DhKmIYebZI
Edit: with the Gi2, I'm pretty sure China will produce their own version after seeing how quickly Gi2 sold out