During the classic period, the healing specialization of each class is very powerful, but only one faction can use it, so it is difficult to compare the two. Now, as the blood elves bring the Paladins to the Horde, the draenei brings the shamans to the Alliance, and a whole new world of composition is available.
For the healer, this will mean more diversification, because the alliance's raids will bring many revival shamans, and the tribal group will snatch one or two paladins.
Classes
Restoring Shaman-S
Shamans are the most powerful raid healers in the game, and their totems provide a lot of practicality.
Chain Heal is the most powerful ability in the game, it can heal multiple people in the team at the same time. At the same time, shamans provide group utility through totems such as poison purification, disease purification, stone skin art, and tremor totem.
A balanced team combination will have 2 to 4 restoration shamans, depending on how much enhancement or elemental shaman the team wants to bring. Regardless of the specifications, you want to have 5 shamans in a 25-person raid, 1 in each group.
Holy priest-A
Priest is the only profession in the game that has two independent talent trees dedicated to healing specialization, and they are displayed.
This class provides important team gains, such as spiritual prayer and power word: toughness, and its utility extends to power word: shield, energy infusion, and fear guard. Priests are powerful single-target healers, but they can also maintain a raid. You may not want more than two priests in a balanced combination, just because of all the other party/raid buffs and the utility provided by various other professions.
Paladin-A
Paladin is the best tank healer in the game. You may not want more than one person in your team, but the role they play is crucial. Their lack of AoE treatment, the Holy Paladin made up for it with pure, pure single-target tank treatment.
At least, a holy paladin in a team will provide all casters with enhanced wisdom blessings to increase the team's overall mana. They also provide functions such as "Blessing Freedom" for utility programs.
Restore Druid-B
Restoring druids is an important profession in the classics, dedicated to giving the Mark of the Wild and using the Circus Flame to debuff the Boss' Raid Mark. But their throughput is severely hampered by the classic buff limit, which prevents them from hitting players with continuous healing effects (HOTs).
In TBC, you will want to bring the same gains and utility to the druids as in the classics, but their survivability will be significantly increased by changing the upper limit of the gain, which allows them to roll HOT and on the tank Other WoW Classic TBC Gold players.
You will want to run a recovery druid to strengthen the Mark of the Wild, but it may not be more because of how powerful other classes are. Proper buy WOW TBC Classic Gold is usually also important in games.