any type of addon that will mark mobs automatically on each pull?

my brother and I both have tank/dps characters so take turns. one thing that seems to always give issues is if we don't mark, dps just aoe on trash. (not so much an issue anymore now that we have gear, but a big issue while gearing) is there any addon that will automatically mark each pull intelligently? healers first, high damage second, low health, etc. not saying that is best priority always but an addon that is smart enough to determine what should be killed first

any input appreciated