Avada Kedavra - what could be more usefull in a duel than killing your aponint , Expeliamus is very useful but no wear near as usefull as AVADA KEDAVRA

agreed.

depends on how dead you want your opponent :)

If you need to get some information from someone, you better keep him alive and suffering.

look at it this way.....

expelliarmus saved harry from voldy on more than one occasion, and avada kedavra has failed voldy more than once. that is my reasoning.

While Expelliarmus certainly proved useful to Harry, I highly doubt 'Expeliamus' would do much more than amuse my 'aponint' (whatever the hell that is...) :P

avada kedavra is great, but if you accidentally meet a potter, it's no use.

You could disarm a person, THEN kill them. Let's face it, it makes it easier, especially if your opponent is a really good dueller.

@luciusmistress - I died when i read the end of your answer. I guess you've proved your point with your chosen curse. ;)

why wast time firs disarming a person and them killing them?..... just kill them

i luv tht 1

you might not actually want to kill your opponent.
also, it killed voldemort

the killing curse can backfire, rebound against an object and hit something else, accidentally kill ur friend. but if u have the disarming spell, there can be less damage, guilt, but it might not work against an 8 pack guy....

Death is easy but to over come, over power, and humiliate but disarming is disgrace. Crushing the ego and pride has more satisfaction to it.

Or Expeliarmus then Avada Kedavra WITH THEIR WAND!

DUH:p

I'm morally opposed to killing people. Best to disarm them and then crucio their asses, :P

Firs use expelliomouse so he cant block THEN Avada kadavra!

So that way people don't get their wand back later and kill you. Avada Kedavra will just finish them off then and there

So useful. But you go to Azkaban!

It's less cruel...

yep