This trinket amazing for early progression, since it is BoE and more than likely someone on your server will have this for sale. It gives very solid stats since it is a stat stick with int and controllable secondary stats. See below for what rotational abilities give what stat.
Critical Strike- Healing Wave, Healing Surge, Chain Heal
Versatility- Lightning Bolt, Riptide
Mastery- Downpour
Haste- Healing Rain (each tick), Wellspring (each hit), Unleash Life