Nanaya blood only reacts to nonhuman. Without it Shiki's just a highschool kid with anemia. He still got the eyes, but not the superhuman speed. Don't see examples from Melty Blood, which is a fighting game where a maid can pwn a vampire princess with a broom and molotov cocktails.
So it's gonna be tough getting close to Shirou if he could sword spam. Dunno if Nanaya mode will switch on if he sees Archer's arm. But if it's Fate/UBW Shirou.. pfft no contest.
Fallan wrote...
Can't he just throw a dart on the point or something?
Not sure about that. But if he could all he's gonna need is a sniper rifle and a camo suit, and wait in a bush for that stupid redhead to come out from his mansion.