If no one else is at Death's Door, you should be able to easily round half or all of the melee guys up and you'll be killing them just as they're respawning. It's quite fun too, and you don't need a great set, just some level 70 blues.
Do it for a few hours and see how many marks/armaments you get. It will be sort of random how much you get because armaments are rare enough that you will often get 0 or 8 in one hour. Figure out how much those marks and armaments would sell for on your server. If that is more than the amount of gold you make per hour doing dailies or other stuff, then go and farm, otherwise do dailies.
Also, complete all your aldor quests in NS and the like.
I recommend watching some TV or listening to an audiobook/podcast while you grind to keep your mind occupied.
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No really, I'm not
addicted.