First of all.. if you are looking to use max wattage, you don't want a tank at all. There is only ONE reason to vape at high wattage.. clouds. Sure, you can get decent flavor, but you get better flavor at lower wattages. That said.. for high wattage you want and RDA or drip atomizer. The only tank I can personally tell you will handle 200W is IJOY RDTA Combo. The "beast" tanks might, but I have not personally used one, so can't comment. One problem I found with tanks and high wattage is wicking. You have to have your coils wicked in such a way that they draw enough juice while vaping at high watts. In addition to wick you also have to consider your air flow around the coil and wicking. The only tank I have heard of that uses around 200w is the TFV8 or TFV10 cloud beast. Even those depend on the coil you use. Now if we are talking clouds.. I can get bigger clouds at lower wattage than either of those tanks can produce. Its all about the coil build, juice from wick and airflow. For example.. a mutationX v4 will kick the snot out of either of those cloud beast tanks, because cloud production is specifically what it was designed for. With cloud builds (high wattage builds), you have to keep your wick fully saturated, anything more than 2 puffs per drip defeats the purpose.