Monk works. For prisons there was one in IIRC Dungeon or Dragon magazine that was in Eberron run by dwarfs that you couldn't get out of, starting with magically treated walls that prevent any form of teleports and stuff, prisoners being gagged and hooded and hands bound, etc. I think you had to go there to get someone out, but I cant remember. The problem with spellcasters was you never had a material stuff, and had to get the mouth gag out and the hands free to get the V and S spells going.