Thank you very much for the guide, and if I may I'd like to contribute. :] Seems to me that the way she chooses her phases are not random, but are predetermined by the effect around her weapons. Notice that they're spewing snowflakes and a frosty animation before her Ice Wave phase, and shooting lightning everywhere before her lightning phases. This seems pretty consistant from my experience in the 10 man version and the raid finder version. Its not a very important part of the fight, as most groups can easily adjust to whatever phase comes at them, but for those who may not be able to it should help for pre-positioning and what-not.