I use two different talent setups based on the fights in EN.
For Ursoc, Cenarius, Xavius I use: Torrent, Graceful Spirit, LST, Deluge, Ancestral Vigor, Cloudburst, High Tide.
For Ill’gynoth and Dragons I use: Torrent, Graceful Spirit, LST, Crashing Waves, Ancestral Vigor, Echo, Ascendance.
For Nythendra and Elerethe (and sometimes Dragons) I switch between these two specs based on what my healing role is and how the raid behaves. If they are good at stacking I use the CH spec and if not I use the HS/HW spec.
To answer your question I am doing fine compared to other healers in EN. I feel resto shamans are strong and fun to play. As the post above says, Healing Rain is very good and should be used on cd.
Good luck in EN!