Out of character, whatever we decide to do, I think we should take a bit of a rest first, to let people get some FP back. Aren't at least a few of us in the 1/2 Move and Dodge territory, from being below 1/3rd FP? That's a bad place to be in, IMO.
Since Madoc's not actually down that many FP (I think my Flash spell was all from energy reserve?), I'm willing to poke about the Mysteriously Inert Temple a bit more while everyone else rests. I don't know if more investigation will reveal more info, but it seems like a way to pass the time anyway. Once the rest is finished, Madoc will advocate trying to find some other route further into the depths, since the doors are going to be unprofitable.