I'm in DW20 1.10 pack at the moment, i followed his plan and built a tier IV blood alter, with a room full of mobs being spawned by cursed earth.
It was a complex build but i followed his guide after several watch through's of his video's.
There is a ritual under the alter above the room.
this is the undecorated blood alter level IV
Another shot showing blood power
The alter auto crafts slates, when done it puts an orb in there to generate power
Here is a shot of the 'murder room', cursed earth lines the floor with a vacuum chest absorbing all of the drops
A storage drawers system storing drops, this is where my slates are stored after auto crafting (DireWolf20's playthrough series has detailed instructions)
Here's a shot of the ritual that sits between the death room and the alter above, the room is turned 'on and off' by wireless red-stone switches and inverted powered lamps, wireless RF charging points power the lamps.
I have hundreds of level 1 through level 3 slates and 1,000,000 blood power.
Hope this helps.
-Wuffle!