Yes, I agree with Taylor. There is a certain point for all types of chars to rely on shadow dailies and fiesta.
I don't know the specific grinding spots for a sense type, since they don't have the luxury of attribute like powers do, but after 260+ fiesta 2x, dailies and chaos tower is a godsend. You can easily gain 1 level a day at that rate, without grinding at all.
Anyways, I recommend the chaos tower floors/monster quests appropriate to your level. The monsters are fairly easy to kill for any class pre-60, so your DA might be able to OHKO there.