I bought the Geekvape Legend Zeus edition. The tank came with 1 Zeus Sub-Ohm Tank 1 Coil Tool 1 3.5mL Spare Glass 1 0.4ohm Mesh Z1 Coil - rated 60-70W 1 0.2ohm Mesh Z2 Coil - rated 70-80W The .2 coil is pre installed and it's the one I'm using. It says rated 70-80 Watts. But I was doing some research and people are vaping at 30 Watts. Is there a low to high I'm supposed to stay in between? I haven't vaped in about 6 months but when I did I had a .5 coil and believe I vaped at 40 Watts. I'm just trying to vape at the correct wattage. Thanks.