The strategy I'm currently favouring is called the bonemass rush; You get the heavy armour; eat 2 hp foods and 1 eitr food( you want to make sure skills are up too) and prepare a bunch of ooze AND bile bombs with a couple major healing meads.

Pop a shield at the start while you're looking for her and when she aggros and the fight starts proper, you pop bonemass and lead her to a nice level wall and you parry/dodge until she does her 4 armed overhead as that will then prompt her to move even closer to you, pinning you to the wall.

then once she's no long in a position to knock you back a huge distance, you just start laying into her with everything; Use one of each bomb every so often to ensure their DoTs are applied as often as possible, and then you go ham with your best slashing or blunt( recommended mistwalker or krom, maybe demolisher) weapon as she is resistance to pierce. when you run out of stamina, switch to a fireball staff and swing that until you run out of eitr and then back to the weapon until you need to reapply the bombs.

Using this strategy you can focus her down before bonemass runs out and use a healing mead when you get low enough. You could also include a prot staff in this cycle as well to help mitigate some damage, as she still does enough damage you may still have the first heal on cooldown, but that would require a pretty high blood magic skill at least around 50-55 for it to really make a difference.