Yes.
You have never played against a team including Nidalee and Alistar. Kind of ridiculous.
I cannot tell you how many times, as Nidalee, I have saved teammates in teamfights and they ended up living, simply because I healed them for 600 damage when the enemy wasn't expecting it.
Healing is huge. Most healers can only heal a little bit at a time, so they spam it a lot to make healing build up.
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~AHylian is Still Alive~