Either fix air elementals to behave like actual D&D air elementals (much like your current air djinnis - where they go in and out of whirlwind mode) or add a knockdown immunity timer directly following the most recent air elemental knockdown.
It is not "playing" a game to watch your character get flung all over a dungeon.
If only there was a way on the forums how one could show why people want a break from the same repetitive annoyance over and over and over.