Originally Posted by
Themos
The healing class that gets the most out of spirit is Holy Priest, and I wouldn't recommend that trinket even for that spec. DS isn't like FL, there are no big burn phases - except for maybe Zon'ozz. You're way better off with an Int trinket, of which there are several options. BiS for raid finder level gear would be the HoU off of spine or Windward Heart if you don't need the spirit.
Until you get anything out of the raid finder, settle for a Core of Ripeness off of the JP vendor. You can also get a Tsunami, but it isn't worth the money if you can replace with a raidfinder DS trinket. Maybe try and pug a Firelands run and get a Jaws of Defeat, that's a nice one - especially the heroic version of it.
$0.02 from a Holy priest