1) Why did I get the exp? I didn't even have the boss in view! In my mind, unless I've done damage (or maybe altered map tiles with a spell/item) I shouldn't get the exp.
2) Shouldn't elite class mob's try to run away from water when air is below 50%? Could do normal stuff till 75% air, 75-50% move if there's a non-water tile within 1 or 2 square, less then 50% actively start searching for a non-water tile.
Anywho, just my two cents
