>>96532642
I though depth crawls were something different. What you are describing sounds more like Goblin Punch's Underclock (again very foe).
>>96532650
If you are doing that much undead I recommend mining Barrowmaze. It's got some interesting twists on regular undead and if you're ever feeling lazy you can always drop whole sections into the one you are putting together.
>It's tomb
Exciting stuff. Similar set up to an abandoned (by me) island megadungeon I have some notes on.