We could definitely make Max a monster if we all cast spells on him. We could do something similar with Tylara as an archer with arrow mind, targeting ray, guided shot, magic weapon, true strike, cats grace and various protective spells.
However, I wonder if we might not be better served by letting Manny sneak in close and use sleep spells to take out the guards? I for one don't like the idea of storming a keep. Does anyone have invisibility?
Whelming Blast is decent area attack spell even though it only does non-lethal damage. It might be useful to share that one.