I saw a few of these but they aren't great. I see it like a Grid varient that would have, say 5 slots, top one is the player with the most treath, second less and so on. But if 4th one would gain agro, he would move up in the collum. Like an hybrid Omen and Grid. You could bind mouse over spells on the positions to pull agro of of them.
To elaborate, it would be possible â but the frames would not be clickable or otherwise interactable, because in order to be interactable, frames must be secure, and secure frames cannot be programmatically moved or modified while in combat. You'd basically have a giant version of Omen. You wouldn't be able to click on the frames or use click bindings or mouseover macros on them.