That's just circling back to the point of needing to be directly above the enemy which isn't happening. You're not having a line of people who are able to transfer one creature from hand to hand only for the last person to be standing on a cliff that just happens to be positioned directly above the enemy. If it's a line of people then you NEED an elevated position like a cliff or a building, otherwise everyone would need a flight speed and position themselves just a little bit in the air each time.

That "idea" is even worse than what I took at face value. You'd have better chances just throwing it.