HoC doesn't seem to give the +5% spell resist that the description says according to /state (values don't change when helm is on/off)
It also seems to have that old bug of when removed sdm goes negative. For example, put the helm on and /state doesn't show sdm increase but take it off and now you have -10% sdm. Put helm back on, still at -10% sdm, take it off and now /state shows -20% sdm. etc.
Don't have a female but assume Fianna has the same issues.