The plot can be coaxed into place, but her spell-set has to match her character and background. And leaves me muttering why they don't have spells to walk through a wall. You can, at high level, create a prolonged doorway through it. You can also teleport for vast distances. A simple little spell to just walk through, or teleport through --
I did say this was going to be home-brew.
And in the other Gamelit front, I started to look at how many spells my characters were hurling. High-level adventurers like that would have a slew. Fortunately, I can throw more monsters at them, and burn them up. Dungeon crawls can justify that, easy. 0:)