I'm new to sub-ohm vaping. I'm using an IClear I sub G tank with a .5 ohm coil on a Coolfire IV 40 watt. I've been using juices that are a 50/50 blend and was wondering if I should go to a 70 VG or Max VG. if I go to a higher VG, will it take higer wattage or lower wattage? Thank you for any and all input.