Sigil has the 'craft contingent spell' feat from complete arcane. It's a cross between contingency and item creation. Basically a character with it can craft an 'item' that's actually a contingent spell active on your person, and can have multiples of these. They can also place these on other people. The only downside to them is that they can be dispelled as spells b/c they're not permanent magical items (Though then again so can a normal contingency).
Unfortunately the warlock lvl 12 imbue item ability combined with this gives any 12th lvl warlock with this feat the ability to have (theoretically) EVERY contingency possible.
As far as Prismatic Sphere - It's definitely a powerful defense, but I fail to see how it makes your character more 'useful'. It's an "OH




, gotta hide!" spell in my opinion.
Ray of Stupidity - Both uses for it follow the same theory as a save or die spell - Either it removes the character it's used on from the equation, or it does practically nothing of worth. Granted, Rho in particular is more resistant to that being a fighter/mage hybrid, but most mages that it is used on cease to be a factor. It's the same as Sundering a fighter's weapon.. Unless he was designed with a backup mode of combat, the fight's basically over at that point.
As I said before, take it if you wish but just know that doing so means NPCs gain acess to it as well.
As it stands now the only thing I'm doing that 'negates' a PC is the bear's grappling, which while I do feel kinda bad for Sabastian/Adamas, isn't too bad considering the sheer number of PCs. Also factor in that the grappling only lasts so long as the bear maintains it and you guys have several ways I can think of that you could get the trapped PC's free... you guys just need to think smart and work together.
Speaking of teamwork, don't forget everyone the bonuses you're getting for the blessing, Oroz's 'feelings', and Chevik's Lion's roar.
just give me a suggestion on how to disable enemy casters that can fly
Dispel Magic or Deal damage? I actually don't see how ray of stupidity would solve that in the first place...
Myth, I think your character is well built, and if I thought she were underpowered I'd have said so earlier. Lets wait till this fight is over before we make any decisions on character's effectiveness, k? (That's kinda the point of me sending these uber-PC's after you guys - to see what you can do to stop them)