There's a section in the listed powers about how having more powers makes each power weaker. Also I'm not sure how I could clearly state power levels but I don't see how you could expect a character designed to create nuclear bombs to be considered normal.

A top level power is usually someone focused on one ability. People who have a lot of powers are usually more focused on variety rather than being strong in one particular area. The more powers you have the weaker they all get. often exponentially. A single power like a pk ability or super speed with all attendant required secondary powers can be pretty ludicrous but not to nuclear bomb degrees. For example The fastest super speedster in this world be able to run at about the speed of sound and would only have super speed, durability, stamina, metabolism and such as their powers. Top level PK users will have a total focus on PK and nothing else (Although pk automatically includes stamina and metabolism, most powers do to the point that you don't need to list those two.) with which they can pull of feats such making massive displays of their element to whatever effect is appropriate for that element.