kreynolds said:
I didn't say anything was unusual. I just said that the party's preparations allowed it to negated a sizeable portion of the winterwight's CR. If the average party is to be expected to negate that portion, then it's CR wouldn't be as high.
There is spell called Energy Immunity. It lasts all day. If I extend it, it will last 2 days. This is realistic way to be immune to most energy types. Would this reduce the EL of all combatents that rely on energy damage? No one can say what is "normal preparation" for a party of medium to high level.
Here is the question though, if a party's normal preparations (buffs, spells known, class abilities) defend very effectively against a creature, don't you want to reward them for good planning? Does doing whatever you normally do change the EL? I would venture to say - maybe. Looks like we are back to eye-balling it.