Legildur said:Usually we are to deep in it to have the time to cast such a spell - the opportunity cost can be excessive when you can cast something damaging instead.
We generally use it when we know/suspect that we will be facing some kind of energy damage. Its been cast in combat twice, and both times we didnt see that energy type again in that encounter. At spell lvl 3, and its 10min/lvl duration, it makes a really good spell to boost via our lesser rod of extend. We almost always cast it out of combat.