Fresh light D/Depths encompass vault edits

Fresh light D/Depths encompass vault edits

 * slaughterboxes: Slightly nerf the placement of 9s, used liberally throughout
   the vault, since the introduction of Depths made them mean quite a bit more.
 * pleasuredromes: Re-introduce long monster listings, now more focused and
   easier-to-parse. It is quite readily a nerf due to how hard Depths scales its
   spawns (a few less  liches now, for example), and the vault wasn't designed
   around said spawn's tiers. The list should have an even split between "is
   native to Depths" and "is not out of place in Depths" while avoiding more
   controversially bizarre choices, now. At least, that's the intent.
 * radiant_caverns: Cut chances of getting the vaults in half (since there are
   two of them), clean up / fix up a convoluted header, cut unused definitions,
   add a few more monsters throughout the set and vault for variety.
 * Put a total of four portals in all of the Depths encompass vaults, to be
   able to accomodate the occasional ziggurat portal placement. On a side
   note, this also increases the chances of shops in spin_cycle, slightly.