Well i did get an answer from Kangertech and this is what i got:
(Hello,
Suggest you use coil over 0.3ohm, it maybe damage the mod if you use the coil under 0.3ohm,thanks.)
So I did take one coil off of my 4 coil RTA and installed it in my single coil RTA and it came up to .55 ohms. So I am...