So I was browsing through e-pedia and saw this line about fortress of ice, "All enemies at pole or melee range with the caster are brought into the fortress." and was really excited but then learned that FOI just has an out exit.
I was wondering what people's thoughts were on having people/enemies that are engaged with the caster have to pass some sort of check in order to leave the fortress. Since TM is easily messed up by breaking line of sight with leaving rooms I think this would be a great way to try to force a warmage's opponent to engage them and make traditional targeted spells more viable.