There are various sorts of Daimons. And I assume Tom will do his best to balance the mortality rate, we now actually have some experience with the whole thing. Mortality rates were already adjusted during the Fourth Invasion.
Even the lowered rates were pretty bad for the monsters, because they had more more chances to kill than everyone else.
As for the various sorts of daimons, perhaps. Third invasion presented a bunch of different types. Last one only had ranged SF types, I think. Thus far, I've not seen many battle reports but I've only seen infantry (or melee SF) types.
