Hi I'm new to the world of vaping, my first kit was the aspire premium kit which came with an aspire nautilus mini and a CF VV+battery, I have recently purchased an Eleaf iStick 30w to use with my aspire nautilus mini, my question is what setting will I use, I have 1.8ohm coils, so what's the highest and lowest voltage range I should try out and try staying within as I'm sure if I was to use full 30w it would damage the coil right.