I'm going to take a guess and say that your warrior was hybrid build and the mage is nearly irrelevent; even before ow came out we didnt allow lvl 70's to participate in falgren fights. Why? Because theyre too low lvl to do any damage.
I completely disagree. A lvl 70 can do good damage if he has the right build, weapons etc, unless he's a druid. There is no class, in my opinion, that at lvl 70+ can't be useful in a fight against for example a Stonefang.
Of course if there are higher lvls who can participate, then yes give the priority, but otherwise this isn't true. Maybe lvl 70s aren't good for OW bosses, but they are good against most bosses found in Stonevale, Shalemont, Dustwither Catacombs and Lirs Reach, with the only bosses where they aren't too useful being Askold, other strong event bosses and maybe the Rockbelly and Shivercowl bosses.
Therefore, I think that Papi has a point, and that if his group did have good builds, and maybe some lux, I see no reason why they can't in the end kill Falgren even though it may take a long time.