Ok I will re-add it for 0.84 so everyone can try it.
I used to take most down > most left place for spawning traps. Should I extend this to vampire spawn too ?
Sure. The way I see it is that any effect that is triggered by an attack should take into consideration the specific monster targeted, especially if the effect is beneficial. The odds are already heavily stacked against the player so any tactical advantage, no matter how small, can be the key to survival in some situation.