Does anyone know how to defeat flemeth on dragon age origins?

i have a rogue that is my main character, alastrair, sten and wynne with me. i had her down to half her health and she kill all my party but me. then she grab me with her mouth. im level 16. im almost done with the game. want to beat her and dragon in the game.Does anyone know how to defeat flemeth on dragon age origins?
Have Sten use the sword Yusaris it has something like 10 attack against dragons. Like someone already mentioned get the drake scale armor for yourself, if you have the blood dragon armor put it on alistair or sten, and if you defeated the dragon in the urn of sacred ashes quest and got the armor made by Wade have sten or alistair wear it (all these have fire resistance) Get what weapons that can be enchanted with runes that do cold damage and get other accessories that deal cold damage or give fire resistance equipped on everyone. Also you should have Wynne learn the cold spells and you can always put it on an easier level for the fight. Good luck
Flemeth normally sticks to one position so all you have to do is use archers from a distance and use wynne from a distance too. Does your wynne has Cone of Cold or Blizzard spell ? If yes, then the job is very easy , use blizzard so that she will freeze for a moderate amount of time.. attack her all you can during that time, then after blizzard is over simply use it again.. You can use of Cone of Cold too, but blizzard is more powerful. Any more help ??Does anyone know how to defeat flemeth on dragon age origins?
you will need Wade superior drakescale armor at the least for the fire resist. equip whatever fire resist you have. bring all the range toons you have and just make sure to stay healed. if you do not have wynn then bring lots of heal pots.
I beat her by making myself the healer by switching character and then just let everyone attack and i kept healing like crazy! have some mana potions handy :)Does anyone know how to defeat flemeth on dragon age origins?
get wanes superior drakescale armor and any other equipment for fire resistance. use a bow and fight for a distance since she will not move (just run away when she pulls you in)