If sub-100% resistance are stacking is multiplicative rather than additive, it might work better... in other words, if a unit has three different 50% fire resistances (perhaps one from an artifact, one from the unit's nature [e.g. a demon] and one from a battlefield spell) then they could stack like this:
50% and 50% and 50% = .5 + .5 + .5 = 150% (additive)
or like this:
50% and 50% and 50% = 1-(1-.5)*(1-.5)*(1-.5) = 1-.125 = 87.5%
By the way, did I mention that it would be nice if national and indy units were useful in the mid and late game in Dom III? I think I did, but wishing twice never hurts
Edit: Ooops, just noticed Chazar already said this exact same thing in another thread...
