something one is good at

• 能事已尽

  have done all one can

• 极尽颠倒是非之能事

  take mixing up the truth with lies to a high art

• 极尽污蔑之能事

  take slander to its extreme

• 极尽推陈出新之能事

  take getting rid of the old and bringing in the new to a high art