Make sure to regen as much as possible throughout the fight.
When you pop DP a first time when you are low on mana, it means you have left it unused for a couple of minutes.
Pop your trinkets (+ arcane torrent) early, like at 90% mana. Use your DP a first time as soon as possible, taking into account 2 factors -1. healing requirements aren't extremely high or other healers can back you up for 9 seconds - 2.you are below 90% mana when you pop it the first time
After that, keep your trinkets and DP on cooldown.
Quote:
I can keep up with any other healer just I go oom much sooner which can easily result in a wipe.
All I read here, is that you are spamming to match the other healer's hps.
It's not a competition.
Healing is about being efficient. Heal your assignment and make sure he/they stay alive, while managing your mana properly.
When you are supposed to heal the tanks, you can be sure, that you won't match hps when comparing to someone who is supposed to spam the raid.
Trying to keep up with raid healers, while being assigned tank healing, means you are casting stuff you don't have to cast, thus using mana which you shouldn't be using.
Compare yourself to healers with the same assignment.
And again, try to heal as a team.
Why does your raid wipe when you run oom? Because the tanks die?
When raid healers can't keep up without you spamming holy radiance, then maybe the problem lays with the usage of raid cooldowns or dps not being fast enough killing stuff.