Group Heal

       Usage: cast 'group heal' : cast 91
      Effect: 3d16 + 100 + level (max of +75)
        Cost: 25 + (10 + level*0.25) * (# of your group in the room)
    Duration: Instant
Casting Time: 12
      Target: All members of caster's group in the room

Group heal only works when you are grouped, otherwise you won't heal anybody.
The spell effect is the same as heal, only that this spell affects all of your
group members in the room with you.

The classes that get the spell group heal are:

cleric     : Level  50 (excellent)
priest     : Level  40 (excellent)
monk       : Level  55 (excellent)
bard       : Level  70 (excellent)
druid      : Level  40 (excellent)
ranger     : Level 100 (excellent)
paladin    : Level  80 (excellent)