Which Element do you think is the most lethal and dangerous during combat? How about for Survival?
Well from watching ATLA I would have to say that fire as an element is probably the most dangerous as they basically took over the whole world while Aang was out.
I think that the most lethal would have to be blood bending though as it gives basically total control over anyone which would definitely give you the advantage in combat.
I think earth or water would probably be the best for survival though so that'd probably be it.