Cephius Leo on Midgardsormrcephster 37 points 1 day ago
Know the fights. You sometimes have to react quickly to big damage on the tank or the raid, or know who to prioritize when healing. There will sometimes be hectic moments where everyone seems to be dying, and you need to triage heal effectively. If you know the fights, you can better manage who needs heals first.
Don't cast regen before pulls as the mob(s) will run right for you instead.
Stoneskin is great but don't rely on it. In most cases you should only be casting it if you have literally nothing else to do and mana isn't an issue.
Get used to using Shroud between 50% and 75% mana. You may not be stressed for mana now, but you might be later.
Know the difference between Medica, Medica 2, and Cure 3 and the situations to use them. Medica is a strong AoE heal, Medica 2 is weaker but places a HoT for 30 seconds, Cure 3 is your strongest AoE heal but requires the group to be stacked up. Medica 2 usually leads to a lot of overhealing and unnecessary aggro generation, so try to limit to when everyone needs a heal and also is expected to take more damage shortly.
Learn to watch your aggro meter and pop shroud to control it when needed. It may hurt your mana regeneration, but you can't heal if you're dead.
Your primary casts should be cure and regen. Try to stay away from Cure 2 unless someone is in danger of dying, or you got a freecure proc. This will go a long way to helping with your mana management.