First worry about keeping your group alive. If that job is easy, then you can add some dps. Have pet up with Leopard or Lion's Roar proc for passive dps (with taunt turned off), unless raid leaders say otherwise. Do the /pet who leader while targetting yourself, your pet, or nothing, at some point during event so Furro's parser will pick up who the pet belongs to. I have more information on dps I usually use in the shaman thread.
This amount of DPS might not be possible with many necros on the raid since I was using more dots than I usually do. I used Fleeting Spirit, 7th and Glyph. I think there were 3 necros on this event, so I figured I had enough room. : )