One of my players plays an Oracle and recently discovered the power of the combination Awesome Display + Color Spray.
A monster that was supposed to be a big challenge was dead within one round. I don't like "Save or Die" powers anyway and this is no better. Reading through the next modules of the Adventure Path we're currently playing (Carrion Crown), I see that this could be a big issue.
I have no problem with powerful characters, but it seems that this particular power may take away a lot of fun from the game as many of the fights will likely be decided with a single die roll in the first round.
What would you do to deal with this? (Note: I don't want to change every encounter to have only monsters that are immune to illusions or something like that. I also don't want to completely destroy the power of the character.)