Replace Gudao with Shiki Tohno and every Singularity / Lost Belt would be finished 3 times as fast.
>Charismatic (arguably more so than Gudao)
>Handsome
>Mystic Eyes of Death Perception allow him to kill anyone and ignore any defensive NP
>More powerful than most servants since he can match 30% of Arcueid and Ciel
>Servant tier durability due to him having parts of Nrvnqsr Chaos mixed with his flesh