How high do I need to build my witch farm for them to die from fall damage?

[Fighterzx_]

I'm planning on building a witch farm using the original spawners' levels (28-36), I wanna know how many blocks do they have to fall to die from full health? I'm planning on building a water elevator and a hole below to hit them once, then they go up and fall to their deaths in another tube right next to me so I can get the xp as well as complete the quests.

 

[Fesa]

I’d say just put the spawner somewhere where you can easily shoot the witches off so you can see how much HP the witches have maximum. Then,
Formula for fall damage with h=height
(h-3)/2= Damage in HP
So I’d suggest making the spawner
the required height plus 5 blocks.
h = HP.2+8
Note that making the falling platform near y= 0 will safe you time (use water to get there)

 

[NielsMun]

Make the spawners 200+ blocks high, if you do it lower the tough witches will survive

 

[FuriousCorgi481]

I would, for 10 heart mobs, use a 23 block fall, for every .5 heart above add another block that way you can harvest XP and use Looting so leave most mobs at 1/2 heart if you can

 

[Violentcreeper7]

I would, for 10 heart mobs, use a 23 block fall, for every .5 heart above add another block that way you can harvest XP and use Looting so leave most mobs at 1/2 heart if you can

that is true

 

[Violentcreeper7]

but the minimum blocks is 11 because 3 blocks is .5 so add one from there for each half until you reach 20

Hope I could help

 

[Fighterzx_]

Thanks. I built to world height limit (256) to 60 drop and as NielsMun said the tough witches survived.

 

[FuriousCorgi481]

Then unsheathe your Looting V sword and start stabbing those witchy feet