It's easy to build and it has high success rate!
What you need:
64 planks
18 slime blocks
Pickaxe
Step 1: find items
Step 2: dig a 3x3 hole
Step 3: fill the hole with slime blocks
Step 4: place a door and barricade
(in this picture doors are behind me)
Step 5: wait for enemies here. As soon as they step on slime blocks, break them.
Good luck!
What you need:
64 planks
18 slime blocks
Pickaxe
Step 1: find items
Step 2: dig a 3x3 hole
Step 3: fill the hole with slime blocks
Step 4: place a door and barricade
(in this picture doors are behind me)
Step 5: wait for enemies here. As soon as they step on slime blocks, break them.
Good luck!