How do you revive fainted party members in Dragon Age 2?

I'm fighting the ancient rock demon (or whatever it's called), and my party keeps getting knocked out. Is there a way to revive them?How do you revive fainted party members in Dragon Age 2?
If you are a mage then you will have a revive ability in your special trees at level 7. Anders has an ability he can learn in his special tree to revive. There is also a potion that you can purchase latter in the game that will revive people automatically with some health and mana.
1. Anders has a personal skill on his Vengeance tree that I think allows him to revive party members.

2. A mage with the spirit healer tree should (I think) also have an ability by which they can revive party members (though I'm unsure as I've yet to pursue this talent tree).

3. A life ward potion will revive a party member upon fainting if they took it before the battle and the effect is active.

4. There's a 'grenade-type' potion (one that another, active character has to throw - any class can do this) that if thrown to the area where the fainted ally is, that ally will be revived. (If you have the crafting recepie this item can be ordered from home - it will state in the description that the item revives party members).How do you revive fainted party members in Dragon Age 2?
If your Hawke is a Mage you could use the revive talent in the Spirit Healer tree or you could use the revive talent in Ander's Vengeance tree. Also if you take the Life Ward potion prior to being knocked out your character or party member that took the potion will be revived upon dying.
I forget what it's called but there is a potion for reviving fallen teammates.How do you revive fainted party members in Dragon Age 2?
Look at Anders' skill tree if you have him I think he has a revive skill.