I understand that Gem Dragons are legal. But they say that they cast as Sorcerers unless you use XPH, in which case they manifest as Cha-based Psions with various primary disciplines. My question is whether they cast as Sorcerers for this competitions or if they can use XPH. I assume probably the former (and similarly that the maneuver variant Wyrm of War in Dragons of Eberron is non-kosher), but wanted clarification.
i would go w/ the former (cast as sorc), however wrym of war would be on the table, simply because both Dragons of Eberron is a valid source, as well as Wrym refers to dragons/snakes in the first place