The Templar is a very diverse and enjoyable class on all play types. As far as a healing class they have a good mixture of class skills with the restoration staff skills, stamina plus magicka synergy skill, and ability to do decent damage with their spam skill while healing.
Templar Healer
Beginner Gear
Mundus stone
The Ritual or The Shadow
Passives
Aedric Spear
All
Dawn's Wrath
Enduring Rays
Restoring Light
All
Light Armor: All
Restoration Staff: All
Destruction Staff: All
Undaunted
Command | Mettle
Dungeon/Trial Healer
Food:
Clockwork Citrus Filet
Champion Points
Craft:
Use whatever you like in this tree
Warfare:
Soothing Tide - 50
Swift Renewal - 50
Focused Mending - 50
Enlivening Overflow - 50
Fitness:
Rejuvination - 50
Fortified- 50
Slippery - 50
Boundless Vitality - 50
Alternative sets to have on hand as raid leaders may require these sets based on their needs and requests