The cast time is pretty much it. Apparently that 1.5 seconds is the fastest casting time of any Fire spell, and if you have talents that proc on a Fire hit, faster casting means more proc chances. Also, it is a little more mana efficient, giving you 1.29-1.58 damage per mana point versus Fireball’s 1.06-1.41 per.
Sort of.
- Healing Touch, learned at level 1, is an instant heal. It’s your average healing spell with a couple seconds of casting time.
- Rejuvenation at level 4 is a Heal-over-Time. It heals for about 1/3 to 1/2 of Healing Touch and does so gradually, but it’s about half the cost and is instant cast, so it’s a decent combat heal.
- Regrowth at 12 is an instant heal plus HoT. Quicker cast time than Healing Touch, costs a little less, and delivers less of an upfront boost, but the total health healed is greater than either of the other two. Very mana efficient.
There’s others, but I suspect those are the ones you’re talking about, Healing Touch and Rejuvenation in particular. Healing Touch is good for when you need health now, Rejuv is good for when you just need a small boost in combat or to top off, and Regrowth is a good all-around efficient heal.
Really, since spells get stronger by ranks, the question to ask generally isn’t “How is this spell more powerful than that one?” but “What situations does this spell excel in that that one doesn’t?” There are some abilities that simply obsolete others, but they’re pretty few.
Why yes, I’m in a theorycrafting mood. Why do you ask?

