My party has cleared out the Earth, Air, and Water temples and Nodes. Their first foray into the Fire temple several levels back nearly led to disaster, so they worked to gain a few more levels before they went in there.
They've defeated 3 of the four prophets, but have yet to meet Vanifer, who has already summoned Imix (the party knows this, too. They also know that they need to get the weapon from Vanifer, but don't know how just yet). They are almost 11th level at the moment and still need to finish the Fire temple (they didn't do many of the side quests, and I feel they are a bit underpowered, so I'm probably going to throw something at them to get them up to 12/13).
Last session, they fought the Efreet in the Fire Temple Forge. In the middle of fighting the Fire Temple forces, Lyzzie, and the Efreet, the Efreet decides to cast an illusion of Imix in the middle of the party. Understandably, the Rogue, Cleric and Wizard freaked, but the Paladin decided to attack the illusion, discovering it wasn't real (and I would have gotten away with it, too, if it wasn't for that meddlesome Paladin).
The party succeeded in defeating the group (this was their 3rd encounter with Lyzzie, who kept going invisible and escaping), and now they are looking to finish clearing out the rest of the temple before heading to the node.