The leak of that track 100 % is <| sep |> which runs into a giant balancing catch 22 where you have to balance a skill that ' s intrinsically designed not to be up all the time being up all the time . Hence the problem . You can still have a build that focuses on a vaal skill . Look at vaal ice nova builds , those aren ' t breaking the game in half but are still relying heavily on a vaal gem as a primary skill but lack 100 % uptime on vaal ice nova . Using a skill as a primary skill doesn ' t mean it has to be up all the time , it just means you have to build it around it not being up all the time and have a solid plan for when it ' s not up . Something the vaal duration skill brigade clearly missed in orientation because they have their skill up the vast majority of the time .