I would say that strangle is down there with bludgeon.
It us interesting that at 78 he can remember details of murders now totaling in the nineties.
And you wouldn’t have thought about it much to arrive at that conclusion.
I haven’t had the choice to not be aware of such things in my life, so I will point out to you that all of the bottom three cause bleeding, which leaves evidence that can be hard to clean up. Bludgeoning also tends to be noisy, plus it will allow the victim a chance to scream.