If Ascendent Element is relevant for you you’re not doing enough damage. She even has the Hex to turn off immunity.
You really had not played a game, aren't you? So many demons with innate Fire Resist/Immunity, so many casters prebuffed with resist Elements. Anyone in this game who want to do any elemental damage needs Ascended Element ASAP. Wasting first turn for the Hex means not killing that Balor you would kill in first round with two Hellfire Rays from Sorcerous Reflex + Standard Action.
And, imho, Favorite Meta is waste of Mythic Ability. I usually go for Bolster + Empower with Maximazed from the Rod. And I usually take Ascended Element (Fire) + x3 Abudant Casting + Second Bloodline (1 lvl Crossblooded Sorcerer dip for x3 Dragon Arcana) so nowhere to fit it in. Well, I also prefer to never rest in dungeon so a I guess we have a different approach to resource management.
WW doesn’t get any Cold spells until Prison/Cone either, you just meta the shit out of Snowball. Unlike Scorching it bypasses SR.
Main reason why WW sucks. She got Snowball and Ember got Scrorching Ray with 3x4d6 + 3x(1d6+5) (Pyromancer Ring) + 3x2d6 (Mallander Insult belt) in the beginning of chapter 3.