You haven't mentioned what your other healers are or if it is 10 or 25 man. The differences are vast.
In 25 man i find holy to be superior overall , 10 man a bit more different , Holy word:Sanctuary is not so effective and that is one of the shining points in Holy. Disc is strong in 10 man but you need the right healers to compliment your Shields(Druids are amazing for this).
In the end it just comes down to the fight and setup
Welcome, Guest. Please 
November 01, 2024, 12:57:17 am
Apply as a Social
Name, age, location, work/school, etc.
Healer
Tank
Why are you playing your current class/spec? Is it simply because it's strong or because you think it's fun?
Any relevant alts you have and their levels.
What professions do you have and why? Any cool/special recipes?
What previous raiding/PvP experience you have, Setups, Ratings etc.
Previous guilds and reasons why you left them.
Times at which you are available. Include things like work shifts, upcoming exams, holidays, etc.
Are you proficient in english? Do you have Discord and can you listen? Do you have a microphone and do you use it?
Do you have a decent computer? Do you have fps issues? What's your internet connection like? Is it stable? Do you have high ping to Kazzak? Do you lag? Do you disconnect every hour?
List any addons you use for raiding and why you use them. Also include a screenshot of your ui (this is mandatory) and list any relevant key bindings that are not shown.
What other games do you play?
Why do you want to join Iron Edge?
Friends? Wowprogress? Openraid? MMO-Champ? Battle.net? Trade spam? Somewhere else?
(Write the name of the owner of the dog in the picture above!)