Lower level summons?

[Chazar]

Bog Beasts are available for C'tis Miasma as starting spell, but I could not find a good use for them. They die pretty easily, but you cannot stack them with C'tis troops either, for Miasma is lacking 100% poison proof units and 50% resistance does not help at all against the bog beaste poisoneous aura.

Of course, one could stack them with VineOgres, but VineOgres are bad for Miasma, since they become diseased and suffer full from the effect (neither having a cold blooded, swamp survival or undead flag).

Maybe they are useful if they are buffed with some protection - or does anyone know some cheap meatshields that are both miasma & poison proof?
(Raise Dead, of course, but Miasma's Marshmasters need SkullStaffs for spamming it...)