Are you my Master?

AU where the cast fight each other in a battle royale for the Holy Grail and where the cast is:

Shirou - Naegi
Saber - Mukuro
Rin - Chihiro
Archer - Mondo
Sakura - Sayaka
Rider - Kirigiri
Kuzuki - Hifumi
Caster - Celestia
Assassin - Ishimaru
Bazett - Hagakure
Lancer - Leon
Illya - Asahina
Berserker - Sakura
Kotomine - Junko
Gilgamesh -Togami
Caren - Fukawa