I'd like to have a self-only heal spell. I know that sounds selfish, but I heal myself a lot during combat if the mob is challenging. It's very helpful to be able to add some of my own healing on top of the healing you are getting from the group healer, especially on Named Mobs that hit for 4-5k and especially if that healer is a Shaman since their heal spells are so slow to cast. I'm quite effecient at hitting my toggle key to go back and forth between the mob and myself and casting at the appropriate time with a mouse click. I can do it in a blink due to our fast cast heals.
But, it would be nice to have just one heal that was Self-Only where there was no need to target myself. It could still be interupted and all that, just like any other spell, but give it a cast time of 1 or 1.5 Seconds and make it Self-Only so you can spam it during tough fights to improve our survivability and assist the healer that's trying to keep us up without having to do all the toggle toggle toggle stuff. It doesn't even have to be all that mana effecient (just like all the rest of our heals) and can be more geared towards helping out on tough fights as opposed to an every day XP grind type heal and that can be managed with the mana ineffeciency.