Hi,
First of all, you must be BWL attuned.
Also, you don't describe your gear properly.
You say you have 8/8 Tier 0?
That is really terrible as healing gear, even upgraded they are not BIS for your class in most cases.
You need 250+ healing gear, decent mp5, etc, which you haven't listed in your application.
Basically, if you want to join our shaman heal team you need to do better, have better gear, and submit a better application.