Interesting thread. Rediscovered it since I'm playing Ctis in dom-III
So I wonder what I could summon safely (i.e. that won't get diseased) under miasma dominion. So, of course undead and inanimate or cool as well as lamias (cold blooded).
I'm not sure about the following:
Vine man/ogres and Ivy king
Tree lords
Elemental royalty
Abominations
Trolls
Farie court
Tarrasque
Not sure if someone still frequents these forums any more but one could hope so