Yes - had converted my other glyphs for the mana. Switched to binlor when my last glyph cast got me to 50 piety which got me the 6%MR I (guess I exactly) needed with 0 walls left in the dungeon. It's amazing how often that kind of thing seems to happen in this game. Shame the screenshot is cut off.. I also ended poisoned as I needed to proc my last burning with a hit on a lvl8-9 snake (right after stone skin).
Also, I can happily report that the other gold challenges are proving to be much tougher.