Is there any reason why Banish Sentinel doesn't banish Blue Armored Guards in Celestia? I mean... they're sentinels. Why wouldn't they be affected by that spell?
The only way to get rid of BAG's is to waste energy catching them. In some areas you can get fish far enough away from them that they don't come after your lure, but it's often a bit more difficult to do in the District of the Stars.
Was this a mistake, or is it intended that Banish Sentinels only banishes some sentinels?