There are three Daughter of Lerion in (or near) East Anglia. The one in the North is Power Level 90, East 160 and South is 340.
Power Level 360 is the "End-Game" Level, but I've killed her with Level 102. I'm dealing only 7-18 Damage with Light-Bow and almost Instant-killed with her Heavy Attack, but with the Focus of the Nornir Ability its not that hard. A few tips if you want to kill her early:
- get all four
Adrenaline Slots and enter the Fight with them filled
- Upgrade your
Rations and enter the Fight with them filled
- use the
Focus of the Nornir Ability (Level 2) with Light-Bow
For each kill you get a piece of Thor Armour Set. You need them to unlock Thors Hammer (Mjolnir)