Any general H/H setup will work (RoJ/SoH, Discordway, Sabway etc). It would be beneficial to take extra hex removal due to the large amount of hexes used in the area (Expel Hexes, Remove Hex, Convert Hexes and Peace and Harmony are all easy to take forms of hex removal which will make your time farming easier.
A group consisting for a Perma sin and a few RoJ nukers can easily farm the Battledepths. Once entered from CTC, go south and clear all the Cromatic Drakes untill you reached the entrance of the Heart of the Shiverpeaks. Here you can rezone and move back towards the CTC entrance.
One permashadowform sin runs to to dungeon and another player playing 600/smite/QZ (the partysetup of SoO run is perfect) kills the first 2 groups to farm the scales. When they are dead, rezone to Jaga Moraine and enter into the dungeon again. This will kill about 8-10 drakes in 2 minutes if done properly.