There are ways to help your conj damage. Level a therm to 6 and cross over thunder. It is a extra dot you can use alongside your aero DoT.

The ability Fluid Aura is probably your class quest skill you obtain by doing your class quest at lv 15 or 20. I can't remember which level gives you your ability. I think its 15. Anyway do your class quests and you will unlock the "hidden" ability you can't see in your action list.

DO ALL THE FATES YOU SEE! I cannot stress this enough for anybody leveling and running out of quests. Specially solo healers. You actually don't need to be in a group to do well. All you need to do is spam heal people around you even if they are at full health. Just make sure you heal people who have agro (being hit by mobs). Fate rewards are determined by threat level, so more agro you have the better score you get. So go. GO! Go my healer friend and heal your butt off!