1971 D: Robert Fuest St: Vincent Price, Joseph Cotten, Hugh Griffith, Terry-Thomas (I only counted for Phibes the kills that looked like they were made personally by him. I'm open to corrections here.)
Total: 10 Misc: other doctors mentioned, ashes in coffin
Dr. Phibes (Price): 5
Plague of Bats: 1 Plague of Frogs: 1 Plague of Blood: 1 Plague of Hail: 1 Plague of Rats: 1 Plague of Beasts: 1 Plague of Locusts: 1 Phibes' Wife: 1 Phibes' Assistant: 1 Plague of Darkness: 1 (Suicide)
I've got this one on DVD, and wondered who you'd attribute the kills to. The blood and darkness deaths are the only one that are absolute definites for Price, the others I'll trust you on your judgement. I'll have to watch it again.