The PCs successfully solved this puzzle. Note that the image above is not the solution; it's merely a picture I took of the puzzle cubes after I finished crafting them.

The true entrance into the Tomb of the Nine Gods was a stone door with a 3 × 3 grid of indentations, each large enough to fit one of the 3" puzzle cubes the PCs gathered in Omu. Each of the shrines they explored detailed a story in which two of the Trickster Gods were opposed to one another. The answer, then, was to place puzzle cubes such that opposing Trickster Gods were at opposite ends of the spectrum, with the neutral Trickster God Unkh (the flail snail) at the very center.