I made a number of wiki pages on designing mob traps.

* Designing mob traps

* Spawn conditions

* Light levels

* Spawn ranges

* Spawn efficiency and (Spawn efficiency calculations)

I made a lot of graphs, tables and screen shots for clarification.

Thats awesome <object class="emojione" data="https://resources.enjin.com/1489581540/themes/core/images/emojione/svg/1f632.svg?0" type="image/svg+xml" standby=":o">:o</object>

Added a page on

* Fall damage

You're cool...

If you guys have any questions left, let them rip.

^ Are they selling wither eggs/spawners now?

You can just use regular skeleton spawners in the nether to get wither skeletons, which has the added benefit of keeping the nether relevant and the value up. There isnt really a point to adding wither spawners if you ask me.