Experimental band and population adjustments for Snake

This deploys the new and revamped monsters into their home.

Naga mages and warriors show up more often, but on shallow floors have
a chance to spawn alone instead of in a band. Salamanders are able to
show up in naga bands in place of plain naga (with low frequency).
Guardian serpent bands focus moreso on melee-capable creatures than
ranged ones and are larger (but the serpents themselves rarer).
Sharpshooters get smaller bands that often contain other sharpshooters
instead of other professional naga (but can still show up as a support
in other bands). Ritualists get bands of snakes instead of naga (with
more common use of mana vipers than elsewhere). Anacondas are more
common in general, and greater naga somewhat more common outside of
the rune vault (though they still do not come with a band). Salamander
mystics will sometimes accompany a naga band (though are the rarest
support) and even more rarely spawn alone with a couple salamanders.
Shock serpents are also a mid-range encounter at moderate frequency.

Since there is a lot of experimental content at work here at once, these
weights are most definitely provisional. I fully expect them to need
some revisions in fairly short order (along with some of the monsters
themselves, perhaps), but this is a least a starting point.

1 files changed, 5 insertions, 0 deletions

diff --git a/crawl-ref/source/mgen_enum.h b/crawl-ref/source/mgen_enum.h
index 8a98c69302..d7b064978b 100644
--- a/crawl-ref/source/mgen_enum.h
+++ b/crawl-ref/source/mgen_enum.h
@@ -102,6 +102,11 @@ enum band_type
     BAND_RAIJU,
     BAND_RAVENS,
     BAND_FAUN_PARTY,
+    BAND_NAGA_ELITES,
+    BAND_NAGA_RITUALIST,
+    BAND_NAGA_SHARPSHOOTER,
+    BAND_SALAMANDERS,
+    BAND_SALAMANDER_ELITES,
     NUM_BANDS                   // always last
 };