What I'm working on for this mod:
Seems that I can get dark beast transformations for dark lord to work with the difficulty of the fight for the dark lord, at least in arena mode. Legends call the dark lords dark beasts though, as it seems the counter is disregarded in worldgen (but it pretty much has to, so I guess that's expected), so confirmation will have to wait until I face one in adventure mode.
It seems still likely that the zoras are the source of the worldgen crash. With lake/river start biomes, the crash seems to be rarer, though. If it gets too worse, I guess there's still the outsider possibility.
In theory, gleeoks can animate their heads now, and they will shoot fireballs. In practice, they seem to ignore the IT_AFFECTED_CREATURE tag, animating everything dead. Also, they seem to leave tons of remains when attacked, that's something else I need to look at.
Gibdos and redeads have their piercing scream, but they need some more testing, as do the sorceresses of ice. The undead also have some fitting material force multipliers (skeletals take more damage, zombies less), and since the ikana can be encountered below town, their natural skills are lowered a bit. Gibdos can also be the result of divine curses, though those keep their non-transformed spouses.
Male gerudos are now more or less equal to the female gerudos in ability, with the dark lords arising from divinely-given secrets.
I think armos statues aren't in the posted version yet. They also still need some love, I think.