Legendary Healer Item?

[MongoJerry]

Personally, first thing I try to figure out for healing a tank is how much of their health bar my max-rank healing touch will cover (2267-2677 not including +heal), then I don't start casting until they're halfway through that, anticipating that they'll take enough damage from then to make the healing touch 'worth it'.

But why not cast a lower rank Healing Touch when the tank is at full life from the beginning? The tank's health will stay higher that way and your mana efficiency will be higher. You can still cancel this Healing Touch if the tank doesn't take any damage while you're casting. Or if the tank takes too much damage while you're casting, your Healing Touch will still land shortly after the tank took the damage, healing part of the damage, and then you can choose at that point whether to use a higher rank Healing Touch on your next cast or use an emergency NS heal.