[Ushitorasan]

well actually amaterasu, tsuyokumi and susano are the the best mangekyou techniques although i think that the third and final technique of the mangekyou depends on the person and in this case it just happens that kakashi created a different technique with the sharingan (which may be the third and final technique along with amaterasu and tsuyokumi) although we're not sure because he only has one eye meaning it has half the effect e.g. if kakashi had obito's right eye then the right eye may have been able to paralyze the target or trap them and then the left eye would be able to transport them into another dimension.