It´s not as dependant on the dd but the tank. Can the tank hold the aggro and the healer is able to keep him up AoE is never a bad choice. Often it´s the better choice to focus down a threat though.

Test it the ini´s you are joining. 3-4 cd´s singletarget then aoe. If he holds tha aggro after 2-3 groups you will be fine and may drop the singletarget cd´s. If not watch it 2-3 Groups and adept if the tank can´t adept.