Most sub ohm tanks have adjustable airflow and can be dialed down. I've got a subtank mini on mine with a 1.5 ohm coil on the rba deck. I tightened the airflow and am running at 12 watts. I haven't tried one but the isub tank is pretty inexpensive but doesn't have an rba deck. I won a triton tank the other day and am excited to try it when it gets here.