I just started doing some healing with my Templar. I don't use a Healing Staff, just the class skills. My main skill to use is Breath of Life, (morph of Rushed Ceremony) and Repentance (forget what that is the morph of, but it is a free spell that restores Stamina and Health from dead mobs). I can keep 4 person groups alive in Vet Dungeons with these two skills. And, do DPS at the same time.
I just started doing some healing with my Templar. I don't use a Healing Staff, just the class skills. My main skill to use is Breath of Life, (morph of Rushed Ceremony) and Repentance (forget what that is the morph of, but it is a free spell that restores Stamina and Health from dead mobs). I can keep 4 person groups alive in Vet Dungeons with these two skills. And, do DPS at the same time.
To add to what Nestor posted, the main reason for a Templar to use a healing staff is to help with magicka regen/conservation. If you're not having problems in that area, there's really no reason you have to use one. I generally slot one as my secondary weapon, just as a security blanket more than anything, but yeah it's not absolutely necessary at higher levels.