DISCLAIMER
I made this build based on personal experience. I'm not a dedicated player, so it probably has some potential of improvement.

DESCRIPTION
An easy-to-use Warden Healer build suitable for veteran dungeons. The key to this build is to stay at a distance, as all healing and support skills can be applied remotely. Especially in the case of Enchanted Growth, it is strongly advised to stay relatively far away from the other group members to maximize the area of effect cone (not too far away, of course). This skill in particular is the AOE burst (panic) heal. Budding Seeds, Siphon Magicka, Mutagen, Lotus Blossom as well as the procs from Chokethorn and Draugr's Rest should be enough to passively heal the group as you go. With Nature's Embrace, you can also apply a nice HOT on your group members or to get around quickly to position yourself in a more strategic position, although it can be a bit tricky to aim properly. Note that Budding Seeds can be used like Healing Springs, because it allows you to activate the heal upon your second cast (it should even be more useful when Healing Springs gets nerfed after the patch).

EQUIPMENT
Head: Chokethorn's Visage (heavy) - Infused, Max. Magicka Enchantment
Shoulders: Chokethorn's Arm Cops (medium) - Divines, Max. Magicka Enchantment
Chest: Draugr's Rest Robe (light) - Infused, Max. Magicka Enchantment
Hands: Draugr's Rest Gloves (light) - Divines, Max. Magicka Enchantment
Waist: Draugr's Rest Sash (light) - Divines, Max. Magicka Enchantment
Legs: Draugr's Rest Breeches (light) - Infused, Max. Magicka Enchantment
Feet: Draugr's Rest Shoes (light) - Divines, Max. Magicka Enchantment
Neck: Necklace of the Healer - Arcane, Magicka Recovery Enchantment
Ring: Ring of the Healer - Arcane, Magicka Recovery Enchantment
Ring: Ring of the Healer - Arcane, Magicka Recovery Enchantment
Front bar: Restoration Staff of the Healer - Powered, Absorb Magicka Enchantment
Back bar: Restoration Staff of the Healer - Powered, Absorb Magicka Enchantment