Mistake #1 Using my healer to attack Branka (she totally ignored Wynne as long as Wynne didn't use any of her attack spells against her).
Mistake #2 Letting Branka use a Lyrium vein! There were three of her!
SUCCESS! All my party got killed except Wynne, so had her cast that one spell I totally forgot she had that makes all the enemies confused.. anyway Wynne kicked the last Golem's ass, then just had her run around using up as many Lyrium veins as she could. Then had her revive Alistair, kept healing him til she could revive my character, then just kept up the healing plus had Alistair use a Lyrium vein so he'd get some stamina back.