She drops a flammable slime bomb, a poisonous slime bomb (categorized as a story item with no combat stats, but i believe they just some aoe dmg thingies and not a true story item), a potion of grater healing (4d4+4HP), potion of Hill Giant Strenth (21 STR for 1 min) and Corellon's Grace staff (Uncommon two handed melee weapon bludgeoning , 1d6 with topple)

What's the staff give other than topple?

Nothing , thats it !!!

Right then, nothing useful was lost!
I guess pushing her into the pit is how you're "supposed" to kill her

In my case i unchained 1 party member and i entered the area where she is, she completelly ignored me and kept hitting her till i killed her whle she stood there doing nothing .

It had a first level Ray of Enfeeblement , 1st level spell too..

too bad for me she didn't spawn at the final location...i could walk in, free mayrina and pick up the loot but can't finish the quest
she'll have to wait for me to kill her in a next run

I like fights like this; keeps my blood pressure down

Would be actually hilarious if she was hiding in the Kua Toa cove XD