This question is simple. With a total of 20 points to spend on Magekyo usage provided you got the techs to use them.....****NOTE that after you use up your twenty you are blind...that's it. Blind. The only way to see again is get eternal or get new eyes from a master Med ninja.
Tsukuyomi-5
Amaterasu-15
Susano-10
Blaze Release: Kagutsuchi-17
Kamui-18
Shield of Amaterasu-10
Vision of Strongest-15
Visual Technique: Powerful Calm-10
Tsukuyomi: Black Dream-7
Tsukuyomi: Amaterasu Moon-Eternal
Tsukuyomi: Hell's decent(this tech I made sorta based off of one of the techs I saw in one of the games I thought ya guys could have details will be below.)-Eternal(this tech twists the clouds over the opponent and creates a black half sphere around them. Then, the sphere pulls them down and destroys the ground with it. Essentially pulling them down to hell, hence the name. The half sphere is fully black and unable to e seen through. But can be overturned like all other Doujutsu of the sharingan.