TheGuv, Thanks for the post and glad to hear it is working so well for you +rep. A few things you should know about mixing damage with healing:
1. The higher level you get, the less your damage will matter to the group.
2. If you select Healing Over Combat, you will cast all DPS spells available to you
3. If you select Auto or Healing Only and spent talent points in either Focused Insight and/or Telluric Currents, you will cast shocks and Lightning Bolt respectively.
4. While Resto spec, regardless of the Combat Style you select a damage spell cast in progress (LvB, LB, etc.) will always be interrupted if it is detected that a group member needs healing and the appropriate heal spell is cast immediately
Thanks for the post and good luck with your Shaman, Bobby53