did u jus say pallys run outa mana fast?! idk wat pallys you group with but when i was startin off healin i only had 1000 heal and 7k mana and i ran heroics fairly often and normal instances were a cake walk even when i started kara with 1200 heal and 8k mana i was never and i repeat NEVER oom. The pallys u grouped with must not have been very good but hey thats not wat this forum is bout so here it goes:

Priests:
good healing
good bubbles
big heals

Druids:
fast heals
Hots
Battle rez

Shamen:
Chain Heal
Totems
good all around heals

Pallys:
Mana efficient
Ok healin
fast
make good off healers in kara


thats wat i gota say to tell u the truth my guild is jus gettin into real raiding and we only got 1 resto sham 2 tree druids and 2 priests the rest are pallys to many to count lol

nuff said