PHB said:
Automatic miss: If you roll a natural 1 (the die shows a 1), your attack automaticly misses.
So, are you saying that the Avenger automaticly misses 9.5 percent of the time?
And how do you adjudicate when the Avenger rolls a 1 on one die, and a 20 on the other? Does he both automatically hit, AND automatically miss?
Fortunately common sense kicks in and reminds us that Oath of Emnity tells us we use one result. Applying the effects of a roll IS using that result, and thus the unused 1 does not get to apply. This is fortunate. Avengers don't like being forced to auto-miss more often than other characters. Also, Elves don't like being told they can't reroll their 1s, and other such non-sense.
The class feature for the Avenger clearly states you make two attack rolls and take either result.
PHB2 said:
...you make two attack rolls and use either result.
It clearly does not say 'take' either; it says 'use'. If you are applying game rules to the roll of a die, you are using that result. You get to only use one of the results. You do NOT get to use both. So if you apply Lucklender to that 1 you rolled, then you are -by definition- using that 1. Also, you auto-miss, because you are -using- a 1 on an attack roll.
So the two possible positions are this:
1) Lucklender applies to extraneous 1s on Oath'd attacks, but such attack automaticly misses regardless of the second die. DM has to figure out what happens if a 1 and 20 come up.
2) Common sense says you don't use the 1 at all.
Enjoy.